Erickson, Jon <br/><br/>
Rock formations and unusual geologic structures: exploring the earth's surface 

 - New York  Facts on File  1993 
 - 196 p.  ilus., láms. 
 - Changing Earth Series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOLOGIA<br/>GEOMORFOLOGÍA
<br/><br/><label>Universal Decimal Class. No.: </label>551.4/E75