Study to assess the impact of various factors upon the yield of wheat crop in Ludhiana District 

 - Ludhiana  Information Unit I A D P Punjab      1978 
 -  1975-76 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Industry - Wheat
<br/><br/><label>Dewey Class. No.: </label>X9(J382:7:7).243s, L8/GD