Hegner, Robert W.  <br/><br/>
Invertebrate zoology / 
Robert W. Hegner , Joseph G. Engemann. 
 - Second edition. 
 - New York, London ;  Macmillan,  1968. 
 - xvi, 619 pages :   illustrations ;   26 cm. 
<br/><br/> includes index.  
<br/><br/><label>ISBN: </label>9780023337802 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology
<br/><br/><label>Dewey Class. No.: </label>592  / HEG