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>LCCN: </label>72-175757 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development<br/>Economic development--Social aspects