Gould, James. <br/><br/>
Biological science / 
James L. Gould, William T. Keeton, with Carol Grant Gould. 
 - 6th ed. 
 - New York :  W.W. Norton,  1996. 
 - xxvi, 1205 p. :  ill. 
<br/><br/><label>ISBN: </label>0393969207 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology.