Congres international de la population 

 - Belgium  International union for the scientific study of population  1977 
 - xxi, 522p.; 23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Family life cycle<br/>Migration<br/>Mortality<br/>Natural fertility<br/>Nuptiality<br/>Population - congresses<br/>Urbanization