LAL, S.S. <br/><br/>
TEXTBOOK OF PRACTICAL ZOOLOGY : INVERTEBRATE 

 - Meerut  Rastogi Publications, Meerut   1992 
<br/><br/><label>ISBN: </label>81 7133 125 4 
<br/><br/><label>Dewey Class. No.: </label>592  / LAL/TE