Ray, Richard G. <br/><br/>
Aerial photograph in geologic interpretation and mapping / 
by Richard G. Ray. 
 - Washington :  United States Government Printing Office,  1960. 
 - vi, 230 p. :  ill. ;  28 cm. 
 - Geological survey professional paper ; 373 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 224 - 227. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Aerial photography.<br/>Photographic interpretation.<br/>Geological mapping.
<br/><br/><label>Dewey Class. No.: </label>551.028  / R264