Simon, George Gaylord,  1902- <br/><br/>
Principles of animal taxonomy / 
Gaylord George S. 
 - New York :  Columbia University Press,  1961. 
 - 247 p. :  illus. ;  24 cm. 
 - Columbia biological series ;  20 .
 - Animal taxonomy. .
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>6013939  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals--Classification.