Asthana, S. S. <br/><br/>
Economic analysis of conservation irrigation in well commanded area of Ludhiana distics  / 

 - Ludhiana:  Department of Agricultural Economics & Sociology,  1966 
 - 
<br/><br/> "A thesis submitted to the Punjab Agricultural University for the degree of Master of Science (Agriculture & A. H.)" 
<br/><br/><label>Dewey Class. No.: </label>338.163170954552  / As853.EA