KOTPAL, R L <br/><br/>
Porifera 

 - 7th Ed.  Reprint 
 -  Rastogi Publishers ,  1990 
 - 130p 
<br/><br/> Series No. 2 
<br/><br/><label>ISBN: </label>81-7133-072-X 
<br/><br/><label>Dewey Class. No.: </label>593.4  / KOT/P