Mayr, Ernst,   1904- <br/><br/>
Principles of systematic zoology/ 
Ernst Mayr, Peter D. Ashlock. 
 - 2nd ed. 
 - New York:  MaGraw-Hill,  1991. 
 - 475 p. :   ill. ;   24 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0070411441 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology--Classification.