Dunbar, Carl O. <br/><br/>
Principles of stratigraphy 

 - New York  John Wiley & Sons  1961 
 - xii,356p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>551.7  / D