Hemphill, William R.  1930- <br/><br/>
Determination of quantitative geologic data with stereometer type instruments / 
by William R. Hemphill. 
 -- Washington :   United States Government Printing Office,   1958 
 - P. 36-56. -- 
 (Geological Survey Bulletin  ;  1043-C).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fotogeología
<br/><br/><label>Universal Decimal Class. No.: </label>55:77