World population prospects as assessed in 1968. 

 - New York :  United Nations,  1973. 
 - vii, 167 p. : 
<br/><br/> "United Nations publication. Sales no. 72.XIII.4." 
<br/><br/><label>ISBN: </label>GDA137 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.
<br/><br/><label>Dewey Class. No.: </label>304.6  / Wo