TY  - RPRT
TI  - Cost-benefit analysis of the initiative to accelerate the digitizing of 7.5-minute maps
AU  - S.R. Gillespie
PY  - 1993
DO  - 10.3133/ofr93351
UR  - https://pubs.usgs.gov/publication/ofr93351
ID  - ofr93351
ER  -