EINSTEIN(Albert) <br/><br/>
"The collected papers of Albert Einstein. Vol 9: The Berlin years :correspondence, January 1919 - April 1920 (English translation of selected texts)" 

 - Princeton  Princeton University Press  2004 
 - Pbk.xxi p. + 358 
<br/><br/><label>ISBN: </label>0691121249 
<br/><br/><label>Source: </label>8079