TY  - RPRT
TI  - The graphic cell method: a new look at digitizing geologic maps
AU  - J.T. Hanley
PY  - 1982
DO  - 10.1016/0098-3004(82)90018-8
UR  - https://pubs.usgs.gov/publication/70011542
ID  - 70011542
ER  -