Sharma, R.K. <br/><br/>
Economics of tractor versus bullock cultivation (a Pilot study in Haryana) / 
R.K. Sharma 
 - Delhi :  AERC ,  1972 
 - 94, 32p. :  ill. ;  30 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture<br/>India<br/>Haryana<br/>Mechanization
<br/><br/><label>Dewey Class. No.: </label>631.3  / SHA