World Bank,  . <br/><br/>
World Development Report 1981 /  

 - 1st ed /  
 - New York :   Oxford University Press. 
 - p192 :  
<br/><br/><label>ISBN: </label>0-19-502998-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>X:89ZB.1`N81t  / M1