Barnes, Robert D. (Robert Drane), 1927-1993 <br/><br/>
Invertebrate zoology 
Robert D. Barnes 
 - 4th ed. 
 - Philadelphia  Saunders College Publishing  1980 
 - xv, 1089 p. : ill. ; 27 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0030567475 
<br/><br/><label>LCCN: </label>77-16997 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates