Simpson, George Gaylord,   1902- <br/><br/>
Tempo and mode in evolution /  
by George Gaylord Simpson. 
 - New York :   Columbia University Press,   c1984. 
 - xxx, 237 p. :   il. 
<br/><br/><label>ISBN: </label>0231058470 
<br/><br/><label>LCCN: </label>a 45000404  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolução.
<br/><br/><label>Dewey Class. No.: </label>575.01