PANDEY (S N) and others. <br/><br/>
Textbook of botany. V2. Ed 2. 

 - 
 - Delhi  Vikas Publishing House.  1988 
 - 495 
 - 2 .
<br/><br/><label>ISBN: </label>0706996186 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bryophyta, Pteridophyta, Gymnosperms, Paleobotany<br/><br/>
<br/><br/><label>Dewey Class. No.: </label>581 PANT