Negi, S.S.. <br/><br/>
General Silvculture /  

 - 1st ed /  
 - Dehra Dun-248001 :   Bishen Singh Mahendra Pal Singh ,   1979 
 - p.96 :  
<br/><br/><label>Dewey Class. No.: </label>JB:5  / M3