Pteridophyta 
Pteridophyta 
 -  various pagination . ; ill.; pbk. 
 - New Delhi  Tata Mc Graw Hill Education Private Limited  2012 
<br/><br/><label>ISBN: </label>9781259003349 
<br/><br/><label>Dewey Class. No.: </label>587 SHA  / 2.587SHA