Clark, Thomas H. <br/><br/>
The Geological Evolution of North America :  A Regional Approach to Historical Geology / 
Th.H. Clark & C.W. Stearn. 
 - New York :  The Ronald Press Company,  1960. 
 - 434 p. :  fig., ill. 
<br/><br/>Includes Index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology