Approaches and methods used in long-term social planning and policy- making :    conclusions of the Seminar at Arc-et-Senans, France (3-10 M ay 1972) and collection of working papers submitted to the Seminar. 

 - New York :    United Nations,    1973. 
 - iv, 274 p. :    ill. ;    28 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Social planning -- Congresses.<br/> System analysis -- Congresses.<br/> Social indicators -- Africa.