TY  - RPRT
TI  - Preliminary geologic map of the Craig 1 degree by 2 degrees Quadrangle, northwestern Colorado
AU  - Ogden Tweto
PY  - 1975
DO  - 10.3133/mf666
UR  - https://pubs.usgs.gov/publication/mf666
ID  - mf666
ER  -