Verma, P.S. <br/><br/>
A manual of practical zoology invertebrates 
by P.S. Verma 
 - 15th rev. ed. 
 - New Delhi:  S. Chand & Company Pvt. Ltd.  1971 
 - x, 497p. 
<br/><br/><label>ISBN: </label>9788121908290 
<br/><br/><label>Dewey Class. No.: </label>K1  / L1