TY  - RPRT
TI  - The digital geologic map of Colorado in ARC/INFO format: Part C. Explanation sheet database
AU  - Gregory N. Green
PY  - 1992
DO  - 10.3133/ofr92507c
UR  - https://pubs.usgs.gov/publication/ofr92507C
ID  - ofr92507C
ER  -