Verma, P.S. <br/><br/>
A Manual of practical zoology invertebrates 
P.S. Verma. 
 - 15th rev. ed. 
 - New Delhi  Sultan Chand  2002 
 - x, 497p., ill.; 24cm. 
<br/><br/><label>ISBN: </label>81-219-0829-9. 
<br/><br/><label>Dewey Class. No.: </label>592.0724  / V51M