Sharma, O.P. <br/><br/>
Pteridophyta 

 - 2nd ed. 
 -  Macmillan  2006 
 - xiv, 
<br/><br/><label>ISBN: </label>140-93030-9  295 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BOTANY
<br/><br/><label>Dewey Class. No.: </label>587  / SHA