Chopra V L <br/><br/>
Conservation for productive agriculture. 

 - New Delhi  Indian Council Of Agricultural Research    1986 
 - 172p.  cm. 
<br/><br/><label>Standard No.: </label>27517 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>JjN06, M6