Hegner, Robert William,  1880-1942. <br/><br/>
Invertebrate zoology / 
[by] Robert W. Hegner [and] Joseph G. Engemann. 
 - 2d ed. 
 - New York :  Macmillan,  1968. 
 - xviii, 619 p.:  illus.;  23 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.
<br/><br/><label>Dewey Class. No.: </label>592  / HEI 1968