National sample survey. no.61, 1956-1957   Notes of the results of the land utilisation survey and crop-culting Experiments.    

 - Calcutta  Academic lib.           1962 
 - 44p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Esn2, N57 - N56, K2.61