The theory of space, time and gravitation / Translated from the Russian by N. Kemmer. Teorii︠a︡ prostranstva, vremeni i ti︠a︡gotenii︠a︡. English Fok, V. A. (Vladimir Aleksandrovich), 1898-1974. Relativity (Physics) Gravitation. 530.1 FOT Includes index. New York : Pergamon Press, c1959. c1959. 1959 Text xiii, 411 p. : eng