Simpson, George Gaylord <br/><br/>
Principles of animal taxonomy. 

 - New York  Columbia University Press  1961. 
 - 247 p.  illus.  24 cm. 
 - Columbia biological series, no. 20 .
<br/><br/><label>LCCN: </label>60013939  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology--Classification.
<br/><br/><label>LC Class. No.: </label>QL351  / .S5 1961 
<br/><br/><label>Dewey Class. No.: </label>590.12