Dunbar, Carl Owen, <br/><br/>
Principles of stratigraphy / 
by Carl O. Dunbar. 
 - New York :  John Wiley & Sons,   1957. 
 - 356 p. :   ill. ;   27 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic