Cassirer, Ernst, 1874-1945 Substance and function; Einstein's theory of relativity / by Ernst Cassirer ; authorized translation by William Curtis Swabey and Marie Collins Swabey

Substance and function; Einstein's theory of relativity / by Ernst Cassirer ; authorized translation by William Curtis Swabey and Marie Collins Swabey . - xxa [S.l.] xxa-fimyyc Dover yyc-fim, cop. 1953 . - xii, 465 p. 21 cm