Negi, S. S. <br/><br/>
Soil conservation 
/ S. S. Negi 
 - Dehra Dun  Bishen Singh Mahendra Pal Singh  1983 
 - 88 p.  : ill.  ; 21 cm. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>631.4  / NEG