Elie cartan-Albert einmstein letters on absolute parall elism 1929-1932  edited by Robert Deber, Tr. by Jules Leroy andJim Retter. 

 - Princeton  University Press  1979 
 - 233p., 21cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical sciences Astronomy.
<br/><br/><label>Dewey Class. No.: </label>510.92  / D20E