Herat, Tissa R. <br/><br/>
Tentative keys to the families & genera  of pteridophytes of Sri Lanka 

 -  2003 
 - iv, 73p.  29cm. 
<br/><br/><label>ISBN: </label>9559911619 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PLANTS
<br/><br/><label>Dewey Class. No.: </label>580  / HER