Held, A.. General relavity and gravitation:One hundred years after the birth of albert einstein:Vol.II / edited by A.Held. - 1st ed / - New York : Plenum Press , 1969 - xvii,540p : ISBN: 0-306-40266-1 Subjects--Topical Terms: Relativity and Gravition Dewey Class. No.: Ck0jN / M0.2