TY  - BOOK
AU  - Ray,Richard G.
TI  - Aerial photograph in geologic interpretation and mapping
U1  - 551.028 
PY  - 1960///
CY  - Washington
PB  - United States Government Printing Office
KW  - Geology
KW  - Aerial photography
KW  - Photographic interpretation
KW  - Geological mapping
N1  - Includes index; Bibliography: p. 224 - 227
ER  -