Sharma R K <br/><br/>
Economics of tractor versus bullock cultivation   A    

 - Delhi  University of Delhi India         1972 
 - 94p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil Industry
<br/><br/><label>Dewey Class. No.: </label>X9(J:1).242.N7, L2