Simpson, George Gaylord, 1902- <br/><br/>
The principles of classification and a classification of mammals 
/ George Gaylord Simpson 
 - New York  American Museum of Natural History  1945 
 - xvi, 350 p. ; 27 cm. 
 - Bulletin of the American Museum of Natural History  no.85 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology--Classification<br/>Mammals--Classification