Hegner, Robert William, <br/><br/>
Invertebrate zoology 
/ Robert W. Hegner [and] Joseph G. Engemann. 
 - 2nd ed. 
 - New York :  Macmillan,  1968 
 - xviii, 619 p.  illus.  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.
<br/><br/><label>Dewey Class. No.: </label>592  / H464