Easton, W. H. <br/><br/>
Invertebrate paleontology / 
[by] W.H. Easton. 
 - New York :  Harper & Row,  c1960. 
 - xii, 701 p. :  ill. ;  23 cm. 
 - Harper's geoscience series .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil.