Simpson, George Gaylord <br/><br/>
Principles of animal taxonomy / 
George Gaylord Simpson 
 - New York :  Columbia University Press,  1961 
 - 247 p. :  ill ;  24 cm. 
 - Columbia biological series ;  no. 20 .
<br/><br/> liabrary has 2 cops. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals--Classification
<br/><br/><label>Dewey Class. No.: </label>590.12