Clark, T.H. Stearn, C.W. <br/><br/>
Geologtical evolution of North American  a regional approach to historical geology 

 -  1960 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Geology<br/>Historical
<br/><br/><label>Dewey Class. No.: </label>551.7  / C39G