SHARMA, O.P. <br/><br/>
PTERRIDOPHYTA 

 - 1st Ed. 
 - NEW DELHI  TATA Mc GRAW HILL EDUCATION PRIVATE LIMITED   2012 
<br/><br/><label>ISBN: </label>978-1-25-900334-9 
<br/><br/><label>Dewey Class. No.: </label>579  / SHA/P