Gravitation :  an introduction to current research / 
edited by Louis Witten 
 - New York :  Wiley,  c1962 
 - x, 481 p. :  ill. ;  24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gravitation<br/>Unified field theories
<br/><br/><label>Dewey Class. No.: </label>531.14  / GRA 1962