Demographic and economic change in developed countries :  National Bureau of Economic Research / 

 - New York :  National Bureau of Economic Research,   1960. 
 - 536p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population studies (Demography)
<br/><br/><label>Dewey Class. No.: </label>304.6  NAT-D