General relativity and cosmology / 
edited by B. (i.e.R.) K. Sachs 
 - New York :  Academic Press,  1971 
 - ii-xii, 387 p. plate :  ill., ports ;  25 cm. 
 - Proceedings of the International School of Physics'Enrico Fermi' ;  course 47 .
 - Proceedings of the International School of Physics'Enrico Fermi' ;  course 47 .
<br/><br/> Second title page in Italian. At head of title: Italian Physical Society  Course held June 30-July 12, 1969  Includes bibliographical references 
<br/><br/><label>ISBN: </label>0123688477 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmogony<br/>Astrophysics<br/>Relativity (Physics)--Congresses