National Sample Survey no.50   12th Round 

 - India  Cabinet secretariat        1957 
 - 347p.  cm. 
<br/><br/><label>Standard No.: </label>169648 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"Esn2, N57, Ko.50"