Clark, Thomas Henry,  1893- <br/><br/>
The geological evolution of North America :  a regional approach to historical geology / 
Thomas H Clark and Colin W. Stearn 
 - New York :  Ronald Press,  1960 
 - 434 p. :  ill. ;  27 cm. 
<br/><br/><label>LCCN: </label>60-06154 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--North America<br/>Paleontology--North America<br/>Geology, Stratigraphic