The Motion,Evolution of Orbits, and Origin of Comets
Infrared Detection Techniques for Space Research : Proceedings of the Fifth Eslab/Esrin Symposium Held in Noordwijk,The Netherlands, June 8-11, 1971
Modes of Irrationality : Preface to a Theory of Knowledge
Mundus Cognobilis and Mundus Causalis
Studies in Soviet Thought
Earthquake Displacement Fields and the Rotation of the Earth : A NATO Advanced Study Institute
Non-Solar X- and Gamma-Ray Astronomy
Periodic Orbits,Stability and Resonances : Proceedings of a Symposium Conducted by the University of São Paulo, the Technical Institute of Aeronauti
Short Handbook of Communist Ideology : Synopsis of the Osnovy marksizma-leninizma with complete index
Soviet Scholasticism
Dynamics,Bifurcation and Symmetry : New Trends and New Tools
Biodiversity Conservation : Problems and Policies. Papers from the Biodiversity Programme Beijer International Institute of Ecological Economics Royal