Demographic and economic change in developed countries :  a conference of the Universities-National Bureau Committee for Economic Research. 

 - New York :  National Bureau of Economic Research, distributed by Columbia University Press,  [1969,1960] 
 - National Bureau of Economic Research. Special conference series ;  National Bureau of Economic Research. Special conference series ;  no. 11 .
<br/><br/> Original in French. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>ISBN: </label>870143026 
<br/><br/><label>LCCN: </label>60005753 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.<br/>Economic history -- 20th century.--Economic history -- 20th century.