Britannica perspectives. 

 - Chicago :  Encyclopaedia Britannica,  1968. 
 - 3 v. : 
<br/><br/> --Bibliographical footnotes. 
<br/><br/><label>ISBN: </label>SOCSCREF191 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civilization, Modern--1950------
<br/><br/><label>Dewey Class. No.: </label>032  / Br