ANANTHAKRISHNAN, T.N. EKAMBARANATHA AYYAR, M. <br/><br/>
MANUAL OF ZOOLOGY, Volume II : CHORDATA 

 - 4th Ed. 
 - Madras  S.Viswanathan Publishers, Madras   1987 
<br/><br/><label>Dewey Class. No.: </label>596  / EKA/MA