Becker Gary S. <br/><br/>
Human capital. 

 - 2nd  ed. 
 - New york :  National bureu of economic reseach,  1975. 
 - 268  p. ;    cm. 
<br/><br/>index. 
<br/><br/><label>ISBN: </label> $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>education.