Geologic field-trip guide to Steens Mountain Loop Road, Harney County, Oregon / 
by James G. Evans and Thresa M. Geisler 
 - Menlo, CA :  U. S. Geological Survey,  2001 
 - vii, 15 p. :  ill. ;  28 cm. 
 - U.S. Geological Survey bulletin ;  2183 .
<br/><br/><label>ISBN: </label>0607971371  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Oregon--Steens Mountain Region--Guidebooks
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Steens Mountain Region (Or.)--Guidebooks