Gravitation and relativity / edited by Hong-yee Chiu and William F. Hoffmann. Chiu, Hong-yee 1932- ed. Hoffmann, William F. joint ed. Gravitation. Relativity (Physics) QC178 .C28 521.12 CHG Most of the chapters are derived from lectures presented at a seminar at the NASA Goddard Institute for Space Studies, N.Y.C., 1961-62. Includes index. New York : W.A. Benjamin, 1964. 1964. 1964 Text xxxv, 353 p. : eng Physical investigations of the universe;