Ager, Derek V. <br/><br/>
Principles of paleoecology 

 - New York:  McGraw-Hill book Campany,  1963. 
 - 371p.;  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontology; paleozoology
<br/><br/><label>Dewey Class. No.: </label>560.45  / AGE