Kummel, Bernhard. <br/><br/>
History of the earth ; an introduction to historical geology 

 - San Francisco :  Feeman,  1961 
 - 610 p.  : ilus. 
<br/><br/><label>LCCN: </label>29672 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología estratigráfica.
<br/><br/><label>Dewey Class. No.: </label>551.7  / K8