Methodology of demogaphic sample surveys. 

 - New York  UN           1971 
 - iii,311p.  cm. 
 - Statistical paper series M;51 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3.N71t4, L1/UN