World population and food supplies, 1980 /A symposium sponsored by the American Society of Agronomy
Wisconsin American Society of Agronomy , 1965
 Buku Teks
Zavelski, F
Comment on Mesure le Temps
Moscou Editions en Langues Etrangeres 1959
 Buku Teks
Comment on the Commentaries and A Fragment on Government
edited by J.H. Burns, H.L.A. Hart
Oxford University Press , 2008
 Buku Teks
Cybernetics, artificial intelligence, and ecology: proceedings of the fourth annual symposium of the American Society for cybernetics
edited by Herbert W. Robinson; Douglas E. Knight
Spartan Books , 1972
 Buku Teks
Lectures on surface science : proceedings of the fourth Latin-American symposium Caracas, Venezuela July 14-18
edited, German R. Castro, Manuel Cardona
Springer-Verlag Berlin Heidelberg, 1987
 Buku Teks