Simpson, George Gaylord,  1902-1984 <br/><br/>
Life of the past :  an introduction to paleontology / 
by George Gaylord Simpson 
 - New Haven :  Yale University Press,  1953 
 - 198 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontology