GUPTA (M K). <br/><br/>
Handbook of organic farming and biofertilizers. 

 - Jaipur  A B D Publishers  2007 
 - ix,220  PB 
<br/><br/><label>ISBN: </label>9788183761 
<br/><br/><label>Dewey Class. No.: </label>631.86   / GUPM