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/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development.<br/>Economic development--Social aspects--Addresses, essays, lectures.
<br/><br/><label>LC Class. No.: </label>HD82  / .L36