Clark, David Leigh,  1931- <br/><br/>
Fossils, paleontology, and evolution / 
by David L. Clark 
 - Dubuque, Iowa :  Wm.C. Brown,  1968 
 - ix, 130 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolutionary paleobiology