Ayyar, M. Ekambaranatha, and Ananthakrishnan, T. N. <br/><br/>
Manual of Zoology : 
Vol. 1, Part - 2 ( Invertebrata ) 
 - Chennai  S. Viswanathan (Printers & Publishers) Pvt. Ltd.  1954 
 - 424 
<br/><br/><label>ISBN: </label>9788187156666 
<br/><br/><label>Publisher. No.: </label> Ananda Book Depot Chennai 
<br/><br/><label>Subjects--Personal Names: </label> Zoology 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology
<br/><br/><label>Dewey Class. No.: </label>592 AYY