Investing in people: The economics of population quality 
Schultz, Theodore. 
 -  University of California Press.  1981 
 - 173 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-520-04437-1 
<br/><br/><label>Dewey Class. No.: </label>306.3 S3871 1991