Ward, Peter Douglas, 1949- <br/><br/>
On Methuselah's trail :  living fossils and the great extinctions / 
Peter Douglas Ward. 
 - New York :  Freeman,  c1992. 
 - xii, 212 p. : ill. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Living fossils<br/>Extinction (Biology)