Dunbar, Carl O.,  1891-1979. <br/><br/>
Principles of stratigraphy / 
Carl O. Dunbar, John Rodgers. 
 - New York :  Wiley,  �1957. 
 - xii, 356 s. :  illustrations 
<br/><br/>S. 319-339: Bibliografi. 
<br/><br/><label>ISBN: </label>0471225398 9780471225393 
<br/><br/><label>Dewey Class. No.: </label>551.7  / P957