Ashok Kumar <br/><br/>
Regional variation in agricultural productivity in 

 - Delhi  University of Delhi India         1992 
 - 238p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Industry
<br/><br/><label>Dewey Class. No.: </label>X9(J):2.271.N9, N2/Th