GEOLOGICAL SURVEY PROFESSIONAL PAPER / 
U.S. Geological Survey 
 -- Washington     Department of the Interior, Government printing office  
<br/><br/>ISSN 0096-0446 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología
<br/><br/><label>Universal Decimal Class. No.: </label>55(08)