Hyman, Libbie Henrietta. <br/><br/>
The Invertebrates: Protozoa through Ctenophora /  

 - 1st ed /  
 - New York :   McGraw-Hill Book Company ,   1962 
 - p.726,x :  
<br/><br/><label>ISBN: </label>0-07-031660-0 
<br/><br/><label>Dewey Class. No.: </label>K1  / J1.1