The measurement of development effort;  study. 

 - New York,  United Nations,  1970. 
 - [United Nations. Document]  TD/B/C.3/75/Add.1/Rev. 1 .
 - Document (United Nations) ;  TD/B/C.3/75/Add.1/Rev. 1 .
<br/><br/> "United Nations publication. Sales number: E.71.II.D.4." 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>LCCN: </label>72170529 //r852 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Developing countries -- Economic conditions.--Developing countries -- Economic conditions.
<br/><br/><label>LC Class. No.: </label>HC59.7  / .U4817 1970 
<br/><br/><label>Dewey Class. No.: </label>330.9/172/4