Alfred Engel, Engelbert Schucking <br/><br/>
The Collected Papers of Albert Einstein Vol- 6 

 - New Jersey  Princetion University Press Princeton and Oxford  1997 
 - Xii,449 
<br/><br/><label>ISBN: </label>0-691-01734-4 
<br/><br/><label>Dewey Class. No.: </label>530  / ENG