Research data bank of development indicators. 

 - Geneva  UN         1977 
 - 195p  cm. 
 -  Vol.4 .
<br/><br/><label>Standard No.: </label>151121 
<br/><br/><label>Source: </label> Reports 
<br/><br/><label>Dewey Class. No.: </label>"X.77.1s, L6.4/UN"