Lefe-span development and behavior / 
ed. by Paul B. Baltes. 
 - New York :  Academic,  1978. 
 - v. 
<br/><br/><label>ISBN: </label>012431800 
<br/><br/><label>Encabezamiento--Tema: </label><br/>CONDUCTA DE VIDA ---INVESTIGACION<br/>Sociología