Lengyel, Peter <br/><br/>
Approaches to the science of socio-economic development / 
edited by Peter Lengyel. With contributions by Raymond Aron [and others]. 
 - Paris :  Unesco,  1971. 
 - 383 p.  illus  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development<br/>Economic development--Social aspects
<br/><br/><label>Dewey Class. No.: </label>330