The McGraw-Hill encyclopedia of world biography :    an international reference work in twelve volumes including an index. 

 - New York :  McGraw-Hill,  c 1973. 
 - Vols. :  ill. ;  29 cm. 
<br/><br/>V.11- Ts'ai-Zworykin ;  
<br/><br/>31  31 
<br/><br/><label>ISBN: </label>07-079633-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biography.<br/>Biography--Dictionaries.
<br/><br/><label>Dewey Class. No.: </label>920.3 / M178