TY  - RPRT
TI  - Surveyors, cartographers, photogrammetrists; identification friends or foes
AU  - Frederick J. Doyle
PY  - 1983
DO  - 10.1080/00690805.1983.10438250
UR  - https://pubs.usgs.gov/publication/70010556
ID  - 70010556
ER  -