TY  - BOOK
AU  - Ray,Richard G.
TI  - Aerial photographs in geologic interpretation and mapping
AV  - QE75 .P9 no. 373
PY  - 1960///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Aerial photography
KW  - Photographic surveying
KW  - Geology
KW  - Maps
N1  - Bibliography: p. 224-227
ER  -