The Aging of populations and its economic and social implications. 

 - New York :  UN ,  1956     
 - vii, 168p.:  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography<br/>Population
<br/><br/><label>Dewey Class. No.: </label>312  / UN 20