O P SHARMA <br/><br/>
PTERID OPHYTA 

 - 2nd Ed. 
 - Delhi  Macmillan India Limited  2018 
 - 378p 
<br/><br/><label>ISBN: </label>1403930309 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BOTANY
<br/><br/><label>Dewey Class. No.: </label>587  / SHA/PTE