Simpson, George Gaylord,  1902-1984, <br/><br/>
Principles of animal taxonomy. 
 Animal taxonomy 

 - xii, 247 páginas 
 - Columbia biological series ;  20 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animales--Clasificación
<br/><br/><label>LC Class. No.: </label>QL351  / S5