Bhatnagar.S.P  Alok Moitra <br/><br/>
Gymnosperms 

 - 1 
 - Delhi  New Age Publishers  1996 
 - 470 
<br/><br/><label>ISBN: </label>978-81-224-0792-1 
<br/><br/><label>Dewey Class. No.: </label>585 N96 BHA