Sharma,O P., <br/><br/>
Pteridophyta 
by O P Sharma 
 - 1st ed. 
 - Chre:  Mcgraw Hill,  2012. 
 -  20 cm. 
<br/><br/><label>ISBN: </label>9781259003349 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany
<br/><br/><label>Dewey Class. No.: </label>583.99