Editores Springer

Cover for H.E. Lindberg · Dynamic Pulse Buckling: Theory and Experiment - Mechanics of Elastic Stability (Hardcover Book) [1987 edition] (1987)

Dynamic Pulse Buckling: Theory a... (1987)

Cover for L D Laude · Interfaces Under Laser Irradiation - Nato Science Series E: (Hardcover Book) [1987 edition] (1987)

Interfaces Under Laser Irradiati... (1987)

Cover for Jack R. Vinson · The behavior of structures composed of composite materials - Mechanics of Structural Systems (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

The behavior of structures compo... (1987)

Cover for F.A. Berezin · Introduction to Superanalysis - Mathematical Physics and Applied Mathematics (Hardcover Book) [1987 edition] (1987)

Introduction to Superanalysis - ... (1987)

Cover for W. I. Fushchich · Symmetries of Maxwell's Equations - Mathematics and Its Applications (Hardcover Book) (1987)

Symmetries of Maxwell's Equation... (1987)

W. I. Fushchich

Cover for V.A. Vasiliev · Autowave Processes in Kinetic Systems: Spatial and Temporal Self-Organisation in Physics, Chemistry, Biology, and Medicine - Mathematics and its Applications (Hardcover Book) [1987 edition] (1987)

Autowave Processes in Kinetic Sy... (1987)

Cover for M.E. Bayles · Principles of Law: A Normative Analysis - Law and Philosophy Library (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Principles of Law: A Normative A... (1987)

Cover for D Krupka · Differential Geometry and Its Applications - Mathematics and Its Applications (Hardcover Book) (1987)

Differential Geometry and Its Ap... (1987)

Cover for National Solar Observatory · The Internal Solar Angular Velocity: Theory, Observations and Relationship to Solar Magnetic Fields - Astrophysics and Space Science Library (Hardcover Book) [1987 edition] (1987)

The Internal Solar Angular Veloc... (1987)

National Solar Observatory

Cover for T C Steemers · Solar Energy Applications to Buildings and Solar Radiation Data: Ec Contractors' Meeting : Papers - Solar Energy and Development (Hardcover Book) (1987)

Solar Energy Applications to Bui... (1987)

Cover for Luis Alcacer · Conducting Polymers: Special Applications Proceedings of the Workshop held at Sintra, Portugal, July 28-31, 1986 (Hardcover Book) [1987 edition] (1987)

Conducting Polymers: Special App... (1987)

Cover for A K Gupta · Advances in Multivariate Statistical Analysis: Pillai Memorial Volume - Theory and Decision Library B (Hardcover Book) [1987 edition] (1987)

Advances in Multivariate Statist... (1987)

Cover for Mustafa Ozder Erdik · Strong Ground Motion Seismology - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Strong Ground Motion Seismology ... (1987)

Mustafa Ozder Erdik

Cover for G Forti · Carbon Dioxide as a Source of Carbon: Biochemical and Chemical Uses - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Carbon Dioxide as a Source of Ca... (1987)

Cover for Wolfgang Kundt · Astrophysical Jets and Their Engines - Nato Science Series C (Hardcover Book) (1987)

Astrophysical Jets and Their Eng... (1987)

Cover for Alfred Z Keller · Reliability Data Bases - Ispra Courses (Hardcover Book) [1987 edition] (1987)

Reliability Data Bases - Ispra C... (1987)

Alfred Z Keller

Cover for P H Rabinowitz · Periodic Solutions of Hamiltonian Systems and Related Topics - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Periodic Solutions of Hamiltonia... (1987)

Cover for J.M. Maclaren · Surface Crystallographic Information Service: A Handbook of Surface Structures (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Surface Crystallographic Informa... (1987)

Cover for Rudolf Kruse · Statistics with Vague Data - Theory and Decision Library B (Hardcover Book) [1987 edition] (1987)

Statistics with Vague Data - The... (1987)

Cover for G E Morfill · Physical Processes in Interstellar Clouds - Nato Science Series C (Hardcover Book) (1987)

Physical Processes in Interstell... (1987)

Cover for Martinus Nijhoff · Future is Tomorrow: 17 Prospective Studies - 2 volumes (Paperback Book) [1972 edition] (1987)

Paperback Book× 2

Future is Tomorrow: 17 Prospecti... (1987)

Martinus Nijhoff

Cover for Guttorm Floistad · African Philosophy - Contemporary Philosophy: A New Survey (Hardcover Book) [1987 edition] (1987)

African Philosophy - Contemporar... (1987)

Guttorm Floistad

Cover for A.Z. Bar-on · The Categories and the Principle of Coherence: Whitehead's Theory of Categories in Historical Perspective - Nijhoff International Philosophy Series (Hardcover Book) [1987 edition] (1987)

The Categories and the Principle... (1987)

Cover for European Grassland Federation · Animal Manure on Grassland and Fodder Crops: Fertilizer or Waste? - Developments in Plant and Soil Sciences (Hardcover Book) (1987)

Animal Manure on Grassland and F... (1987)

European Grassland Federation

Cover for D.R. Anderson · Creativity and the Philosophy of C.S. Peirce - Martinus Nijhoff Philosophy Library (Hardcover Book) [1987 edition] (1987)

Creativity and the Philosophy of... (1987)

Cover for H L Gholz · Agroforestry: Realities, Possibilities and Potentials (Hardcover Book) [1987 edition] (1987)

Agroforestry: Realities, Possibi... (1987)

Cover for H.I. Ene · Thermal Flows in Porous Media - Theory and Applications of Transport in Porous Media (Hardcover Book) [1987 edition] (1987)

Thermal Flows in Porous Media - ... (1987)

Cover for Michael Golan · Well Performance (Hardcover Book) [1987 edition] (1987)

Well Performance (1987)

Cover for Radu J Bogdan · Jaakko Hintikka - Profiles (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Jaakko Hintikka - Profiles (1987)

Cover for J Kleczek · Exercises in Astronomy: Revised and Extended Edition of “Practical Work in Elementary Astronomy” by M.G.J. Minnaert (Hardcover Book) [Second Edition 1987 edition] (1987)

Second Edition 1987 edition

Exercises in Astronomy: Revised ... (1987)

Cover for N. Rescher · Forbidden Knowledge: And Other Essays on the Philosophy of Cognition - Episteme (Hardcover Book) [1987 edition] (1987)

Forbidden Knowledge: And Other E... (1987)

Cover for Paul T Durbin · Technology and Responsibility - Philosophy and Technology (Paperback Book) [New edition] (1987)

Technology and Responsibility - ... (1987)

Cover for J Kleczek · Exercises in Astronomy: Revised and Extended Edition of “Practical Work in Elementary Astronomy” by M.G.J. Minnaert (Paperback Book) [Second Edition 1987 edition] (1987)

Second Edition 1987 edition

Exercises in Astronomy: Revised ... (1987)

Cover for O. Costa-De-Beauregard · Time, The Physical Magnitude - Boston Studies in the Philosophy and History of Science (Hardcover Book) [1987 edition] (1987)

Time, The Physical Magnitude - B... (1987)

O. Costa-De-Beauregard

Cover for Nathan Rotenstreich · Time and Meaning in History - Boston Studies in the Philosophy and History of Science (Hardcover Book) [1987 edition] (1987)

Time and Meaning in History - Bo... (1987)

Nathan Rotenstreich

Cover for H. Siegel · Relativism Refuted: A Critique of Contemporary Epistemological Relativism - Synthese Library (Hardcover Book) [1987 edition] (1987)

Relativism Refuted: A Critique o... (1987)

Cover for N. Rescher · Scientific Realism: A Critical Reappraisal - The Western Ontario Series in Philosophy of Science (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Scientific Realism: A Critical R... (1987)

Cover for The Physicist's Conception of Nature (Paperback Book) [1987 edition] (1987)

The Physicist's Conception of Na... (1987)

Cover for S G Tzafestas · System Fault Diagnostics, Reliability and Related Knowledge-Based Approaches: Volume 1 Fault Diagnostics and Reliability Proceedings of the First European Workshop on Fault Diagnostics, Reliability and Related Knowledge-Based Approaches, Island of Rhodes, (Hardcover Book) [1987 edition] (1987)

System Fault Diagnostics, Reliab... (1987)

Cover for S G Tzafestas · System Fault Diagnostics, Reliability and Related Knowledge-Based Approaches: Volume 2 Knowledge-Based and Fault-Tolerant Techniques Proceedings of the First European Workshop on Fault Diagnostics, Reliability and Related Knowledge-Based Approaches, Islan (Hardcover Book) [1987 edition] (1987)

System Fault Diagnostics, Reliab... (1987)

Cover for D. Hestenes · Clifford Algebra to Geometric Calculus: A Unified Language for Mathematics and Physics - Fundamental Theories of Physics (Paperback Book) [Softcover reprint of the original 1st ed. 1984 edition] (1987)

Softcover reprint of the original 1st ed. 1984 edition

Clifford Algebra to Geometric Ca... (1987)

Cover for A G Colombo · Reliability Modelling and Applications: Course : Papers - Ispra Courses (Closed) (Hardcover Book) (1987)

Reliability Modelling and Applic... (1987)

Cover for J C Domanus · Collimators for Thermal Neutron Radiography: an Overview (Hardcover Book) (1987)

Collimators for Thermal Neutron ... (1987)

Cover for Fevzi Belli · Fehlertolerierende Rechensysteme / Fault-tolerant Computing Systems: 3. Internationale Gi/itg / Gma-fachtagung / 3rd International Gi/itg / Gma Conference (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1987 edition] (1987)

Softcover Reprint of the Original 1st Ed. 1987 edition

Fehlertolerierende Rechensysteme... (1987)

Cover for T.J. Saxby · The Quest for the New Jerusalem, Jean de Labadie and the Labadists, 1610–1744 - International Archives of the History of Ideas Archives internationales d'histoire des idees (Hardcover Book) [1987 edition] (1987)

The Quest for the New Jerusalem,... (1987)

Cover for T J Smith · Modelling the Flow and Solidification of Metals (Hardcover Book) [Reprinted from APPLIED SCIENTIFIC RESEARCH, 44:1-2 edition] (1987)

Reprinted from APPLIED SCIENTIFIC RESEARCH, 44:1-2 edition

Modelling the Flow and Solidific... (1987)

Cover for W. Noll · Finite Dimensional Spaces: Algebra, Geometry and Analysis - Mechanics: Analysis (Paperback Book) [Softcover Reprint of the Original 1st Ed. 1987 edition] (1987)

Softcover Reprint of the Original 1st Ed. 1987 edition

Finite Dimensional Spaces: Algeb... (1987)

Cover for Anna-teresa Tymieniecka · Morality within the Life- and Social World: Interdisciplinary Phenomenology of the Authentic Life in the “Moral Sense” - Analecta Husserliana (Hardcover Book) [1987 edition] (1987)

Morality within the Life- and So... (1987)

Anna-teresa Tymieniecka

Cover for Dieter Ehhalt · Scientific Application of Baseline Observations of Atmospheric Composition (SABOAC) (Hardcover Book) [Reprinted from JOURNAL OF ATMOSPHERIC CHEMISTRY, 3 edition] (1987)

Reprinted from JOURNAL OF ATMOSPHERIC CHEMISTRY, 3 edition

Scientific Application of Baseli... (1987)

Cover for Burwick, Frederick, Professor · Approaches to Organic Form: Permutations in Science and Culture - Boston Studies in the Philosophy and History of Science (Hardcover Book) [1987 edition] (1987)

Approaches to Organic Form: Perm... (1987)

Burwick, Frederick, Professor

Cover for V P Singh · Hydrologic Frequency Modeling: Proceedings of the International Symposium on Flood Frequency and Risk Analyses, 14-17 May 1986, Louisiana State University, Baton Rouge, U.S.A. (Hardcover Book) [1987 edition] (1987)

Hydrologic Frequency Modeling: P... (1987)

Cover for V P Singh · Application of Frequency and Risk in Water Resources: Proceedings of the International Symposium on Flood Frequency and Risk Analyses, 14-17 May 1986, Louisiana State University, Baton Rouge, U.S.A (Hardcover Book) [1987 edition] (1987)

Application of Frequency and Ris... (1987)

Cover for Vijay P Singh · Flood Hydrology: Proceeding of the International Symposium on Flood Frequency and Risk Analyses, 14-17 May 1986, Louisiana State University, Baton Rouge, USA (Hardcover Book) [1987 edition] (1987)

Flood Hydrology: Proceeding of t... (1987)

Cover for Vijay P Singh · Regional Flood Frequency Analysis: Proceedings of the International Symposium on Flood Frequency and Risk Analyses, 14-17 May 1986, Louisiana State University, Baton Rouge, U.S.A. (Hardcover Book) [1987 edition] (1987)

Regional Flood Frequency Analysi... (1987)

Cover for C R Smith · Maximum Entropy and Bayesian Spectral Analysis and Estimation Problems: Proceedings of the Third Workshop on Maximum Entropy and Bayesian Methods in Applied Statistics, Wyoming, U.s.a., August 1-4, 1983 - Fundamental Theories of Physics (Hardcover Book) (1987)

Maximum Entropy and Bayesian Spe... (1987)

Cover for Madan L Puri · Mathematical Statistics and Probability Theory (Hardcover Book) (1987)

Mathematical Statistics and Prob... (1987)

Cover for Werner Callebaut · Evolutionary Epistemology: A Multiparadigm Program - Synthese Library (Hardcover Book) [1987 edition] (1987)

Evolutionary Epistemology: A Mul... (1987)

Werner Callebaut

Cover for International Astronomical Union · Structure and Dynamics of Elliptical Galaxies: Proceedings of the 127th Symposium of the International Astronomical Union Held in Princeton, U.S.A., May 27-31, 1986 - International Astronomical Union Symposia (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Structure and Dynamics of Ellipt... (1987)

International Astronomical Union

Cover for N.J. Moutafakis · The Logics of Preference: A Study of Prohairetic Logics in Twentieth Century Philosophy - Episteme (Hardcover Book) [1987 edition] (1987)

The Logics of Preference: A Stud... (1987)

N.J. Moutafakis

Cover for Dudley, Underwood (DePauw University, Indiana) · A Budget of Trisections (Hardcover Book) (1987)

A Budget of Trisections (1987)

Dudley, Underwood (DePauw Univer...

Cover for Gerhard Leder · Hochbaukonstruktionen : Band Iv: Treppen (Paperback Book) [German, 1. Aufl. 1987. Nachdruck edition] (1987)

German, 1. Aufl. 1987. Nachdruck edition

Hochbaukonstruktionen : Band Iv:... (1987)

Cover for Gerhard Leder · Hochbaukonstruktionen : Band Iii: Dachdeckungen (Paperback Book) [German edition] (1987)

Hochbaukonstruktionen : Band Iii... (1987)

Cover for Kevin Mulligan · Speech Act and Sachverhalt: Reinach and the Foundations of Realist Phenomenology - Primary Sources in Phenomenology (Hardcover Book) [1987 edition] (1987)

Speech Act and Sachverhalt: Rein... (1987)

Cover for Joseph Ed Kockelmans · Phenomenological Psychology: The Dutch School - Phaenomenologica (Hardcover Book) [1987 edition] (1987)

Phenomenological Psychology: The... (1987)

Joseph Ed Kockelmans

Cover for R.S. Gall · Beyond Theism and Atheism: Heidegger's Significance for Religious Thinking - Studies in Philosophy and Religion (Hardcover Book) [1987 edition] (1987)

Beyond Theism and Atheism: Heide... (1987)

Cover for M S Wolfe · Integrated Control of Cereal Mildews: Monitoring the Pathogen - Advances in Agricultural Biotechnology (Hardcover Book) [1987 edition] (1987)

Integrated Control of Cereal Mil... (1987)

Cover for Stefan Rolewicz · Functional Analysis and Control Theory: Linear Systems - Mathematics and Its Applications (Hardcover Book) (1987)

Functional Analysis and Control ... (1987)

Stefan Rolewicz

Cover for Moritz Schlick · The Problems of Philosophy in Their Interconnection: Winter Semester Lecture, 1933-34 - Vienna Circle Collection (Hardcover Book) [1987 edition] (1987)

The Problems of Philosophy in Th... (1987)

Cover for Brian Mcguinness · Unified Science: The Vienna Circle Monograph Series originally edited by Otto Neurath, now in an English edition - Vienna Circle Collection (Hardcover Book) [English edition] (1987)

English edition

Unified Science: The Vienna Circ... (1987)

Brian Mcguinness

Cover for N. Vakhania · Probability Distributions on Banach Spaces - Mathematics and Its Applications (Hardcover Book) (1987)

Probability Distributions on Ban... (1987)

Cover for Thomas F Glick · The Comparative Reception of Relativity - Boston Studies in the Philosophy and History of Science (Hardcover Book) [1987 edition] (1987)

The Comparative Reception of Rel... (1987)

Cover for H. Fischbein · Intuition in Science and Mathematics: An Educational Approach - Mathematics Education Library (Hardcover Book) [2002 edition] (1987)

Intuition in Science and Mathema... (1987)

Cover for H G Jones · Seasonal Snowcovers: Physics, Chemistry, Hydrology - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Seasonal Snowcovers: Physics, Ch... (1987)

Cover for A K Gupta · Multivariate Statistical Modeling and Data Analysis: Proceedings of the Advanced Symposium on Multivariate Modeling and Data Analysis May 15–16, 1986 - Theory and Decision Library B (Hardcover Book) [1987 edition] (1987)

Multivariate Statistical Modelin... (1987)

Cover for Vincenzo Balzani · Supramolecular Photochemistry - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Supramolecular Photochemistry - ... (1987)

Vincenzo Balzani

Cover for R. Laulajainen · Spatial Strategies in Retailing - GeoJournal Library (Hardcover Book) [1987 edition] (1987)

Spatial Strategies in Retailing ... (1987)

Cover for Hannu Nurmi · Comparing Voting Systems - Theory and Decision Library A: (Hardcover Book) [1987 edition] (1987)

Comparing Voting Systems - Theor... (1987)

Cover for W H Berger · Abrupt Climatic Change: Evidence and Implications - NATO Science Series C (Hardcover Book) [1987 edition] (1987)

Abrupt Climatic Change: Evidence... (1987)

Cover for B.S. Razumikhin · Classical Principles and Optimization Problems - Mathematics and its Applications (Hardcover Book) [1987 edition] (1987)

Classical Principles and Optimiz... (1987)

B.S. Razumikhin

Cover for Gerard Trottet · Particle Acceleration and Trapping in Solar Flares: Selected Contributions to the Workshop Held at Aubigny-sur-nere (Bourges), France, June 23-26, 1986 (Hardcover Book) (1987)

Particle Acceleration and Trappi... (1987)

Cover for Michael Schmid · Evolutionary Theory in Social Science - Theory and Decision Library A: (Hardcover Book) [1987 edition] (1987)

Evolutionary Theory in Social Sc... (1987)

Cover for Gerhard Leder · Hochbaukonstruktionen : Band Ii: Allgemeine Konstruktionsprinzipien (Paperback Book) [German edition] (1987)

Hochbaukonstruktionen : Band Ii:... (1987)

Cover for T. Mura · Micromechanics of Defects in Solids - Mechanics of Elastic and Inelastic Solids (Paperback Book) [2nd ed. 1987. Softcover reprint of the original 2n edition] (1987)

2nd ed. 1987. Softcover reprint of the original 2n edition

Micromechanics of Defects in Sol... (1987)

Cover for Jan J.T. Srzednicki · The Democratic Perspective: Political and Social Philosophy (Hardcover Book) [1988 edition] (1987)

The Democratic Perspective: Poli... (1987)

Jan J.T. Srzednicki

Cover for J T Srzednicki · Initiatives in Logic - Reason and Argument (Hardcover Book) [1987 edition] (1987)

Initiatives in Logic - Reason an... (1987)

Cover for G I Schukller · Stochastic Methods in Structural Dynamics - Mechanics: Dynamical Systems (Hardcover Book) [1987 edition] (1987)

Stochastic Methods in Structural... (1987)

Cover for G. Mirkowska · Algorithmic Logic (Hardcover Book) (1987)

Algorithmic Logic (1987)

Cover for R.S. Bortkovskii · Air-Sea Exchange of Heat and Moisture During Storms - Atmospheric and Oceanographic Sciences Library (Hardcover Book) [Revised edition] (1987)

Revised edition

Air-Sea Exchange of Heat and Moi... (1987)

R.S. Bortkovskii

Cover for Fionn Murtagh · Multivariate Data Analysis - Astrophysics and Space Science Library (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

Multivariate Data Analysis - Ast... (1987)

Cover for V.E. Zuev · Statistical Models of the Temperature and Gaseous Components of the Atmosphere - Atmospheric and Oceanographic Sciences Library (Hardcover Book) [1987 edition] (1987)

Statistical Models of the Temper... (1987)

Cover for Andrew Harrison · Philosophy and the Visual Arts: Seeing and Abstracting - Royal Institute of Philosophy Conferences (Hardcover Book) [1987 edition] (1987)

Philosophy and the Visual Arts: ... (1987)

Andrew Harrison

Cover for Horst-heino Von Borzeszkowski · The Meaning of Quantum Gravity - Fundamental Theories of Physics (Hardcover Book) (1987)

The Meaning of Quantum Gravity -... (1987)

Horst-heino Von Borzeszkowski

Cover for D. Hestenes · New Foundations for Classical Mechanics - Fundamental Theories of Physics (Paperback Book) [Softcover reprint of the original 1st ed. 1987 edition] (1987)

Softcover reprint of the original 1st ed. 1987 edition

New Foundations for Classical Me... (1987)

Cover for L.H. Aller · Physics of Thermal Gaseous Nebulae: Physical Processes in Gaseous Nebulae - Astrophysics and Space Science Library (Paperback Book) [Softcover reprint of the original 1st ed. 1984 edition] (1987)

Softcover reprint of the original 1st ed. 1984 edition

Physics of Thermal Gaseous Nebul... (1987)

Cover for Alfred Lande · Selected Scientific Papers of Alfred Lande - Fundamental Theories of Physics (Hardcover Book) [1988 edition] (1987)

Selected Scientific Papers of Al... (1987)

Cover for International Astronomical Union · Advances in Helio- and Asteroseismology: Proceedings of the 123th Symposium of the International Astronomical Union, Held in Aarhus, Denmark, July 7-11, 1986 - International Astronomical Union Symposia (Paperback Book) [Softcover reprint of the original 1st ed. 1988 edition] (1987)

Softcover reprint of the original 1st ed. 1988 edition

Advances in Helio- and Asterosei... (1987)

International Astronomical Union

Cover for Martin Beniston · Interactions between Energy Transformations and Atmospheric Phenomena. A Survey of Recent Research (Hardcover Book) [Reprinted from BOUNDARY LAYER METEOROLOGY, 4, 1987 edition] (1987)

Reprinted from BOUNDARY LAYER METEOROLOGY, 4, 1987 edition

Interactions between Energy Tran... (1987)

Martin Beniston

Cover for Air Pollution and its Influence on Vegetation: Causes - Effects - Prophylaxis and Therapy - Tasks for Vegetation Science (Hardcover Book) (1987)

Air Pollution and its Influence ... (1987)

Cover for J Van Andel · Disturbance in Grasslands: Causes, Effects and Processes - Geobotany (Hardcover Book) (1987)

Disturbance in Grasslands: Cause... (1987)

Cover for Radu Negrutiu · Elastic Analysis of Slab Structures - Mechanics of Surface Structure (Hardcover Book) [1987 edition] (1987)

Elastic Analysis of Slab Structu... (1987)