Lengyel Peter Ed. <br/><br/>
Approaches to the science of socio economic develo 
Lengyel Peter Ed. 
 - Paris  Unesco            1971 
 - 383p. Bibliography at the end of few chapters  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic Development
<br/><br/><label>Dewey Class. No.: </label>X:770gY, L1