World book encyclopedia: 1950 annual supplement / 
s.n. 
 -  Field Enterprises Corporation, USA,  1950 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General encyclopedic works - In English
<br/><br/><label>Dewey Class. No.: </label>R 032 WOR.50