Geological Survey Professional Paper 

 - Washington  US government Printing Office  0 
<br/><br/><label>ISSN: </label>1205 
<br/><br/><label>Standard No.: </label>
<br/><br/><label>LC Class. No.: </label>01GSPP       
<br/><br/><label>GPO Item No.: </label>1001205