Gould, Stephen Jay. <br/><br/>
Hen's teeth and horse's toes / 
Stephen Jay Gould. 
 - 1st ed. 
 - New York :  Norton,  1983. 
 - 413 p. ;  24 cm. 
<br/><br/>Includes index. Bibliography : p.386-393. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution.