TRIMBLE, Donald E. <br/><br/>
Geology of Portland, Oregon and adjacent areas / 
by Donald E. Trimble. 
 -- Washington :   United States Government Printing Office,   1963 
 - 118 p. + map. -- 
 (Geological Survey Bulletin  ; 1119).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología<br/>Oregon
<br/><br/><label>Universal Decimal Class. No.: </label>55(795)