PANDEY, S.N <br/><br/>
A textbook of Pteridophyta 

 - New Delhi :  Vikas ublishing House Pvt. Lt  d          1997 
 - viii, 252 
<br/><br/><label>ISBN: </label>0-7069-9852-9 
<br/><br/><label>Dewey Class. No.: </label>587