TY  - BOOK
AU  - Dumbleton, M. J.
TI  - Air photographs for investigating natural changes,: past use and present condition of engineering sites
AV  - TE7 R63 no. 1085 
PY  - 1983///
CY  - Crowthorne, Berkshire
PB  - Transport and Road Research Laboratory
KW  - Photography, Aerial
ER  -