TY - RPRT TI - On the use of space photography for identifying transportation routes; a summary of problems AU - David S. Simonett AU - Floyd M. Henderson AU - Dwight D. Egbert PY - 1970 DO - 10.3133/ofr71261 UR - https://pubs.usgs.gov/publication/ofr71261 ID - ofr71261 ER -