Emmons, William <br/><br/>
Geology :  principles and processes. 

 - New York :  McGraw-Hill,  1939. 
 - 451 p. :  il. ;  23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>551