Ray, Richard Godfrey   1920- <br/><br/>
Aerial photographs in geologic interpretation and mapping / 
by Richard G. Ray. 
 -- Washington :   United States Government Printing Office,   1960 
 - 230 p. -- 
 (Geological Survey Professional Paper  ; 373).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fotografía aéreaa<br/>Geología
<br/><br/><label>Universal Decimal Class. No.: </label>55:778.35