Approaches to the science of socio-economic development / 
edited by Peter Lengyel. With contributions by Raymond Aron [and others] 
 - Paris :  Unesco,  1971. 
 - 383 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development.<br/>Economic development--Social aspects.
<br/><br/><label>Dewey Class. No.: </label>301.44  / APP