Dunbar, Carl Owen,  1891- <br/><br/>
Principles of stratigraphy / 
Carl O. Dunbar, John Rodgers. 
 - New York :  Wiley,  1957. 
 - 356 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic.