TY  - RPRT
TI  - Geologic and biostratigraphic map of the Pierre shale in the Canon City-Florence Basin and the Twelvemile Park area, south-central Colorado
AU  - G. R. Scott
AU  - W. A. Cobban
PY  - 1975
DO  - 10.3133/i937
UR  - https://pubs.usgs.gov/publication/i937
ID  - i937
ER  -