Social science organization and policy :  first series : Belgium, Chile Egypt, Hungary, Nigeria, Sri Lanka / 
with an introduction by A. B. Cherns. 
 - The Hague, Holanda :  París :  Mouton ;  UNESCO,  1974 
<br/><br/><label>ISBN: </label>271930817X 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>3 (100) =20 SCI.