Concept of a stable population 

 - New  York UN        1968 
 - "x,237p"  cm. 
 - "United Nations, Population studies.39" .
<br/><br/><label>Standard No.: </label>18106 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"Y:5.1-1.N6, K8/UN"