TY  - RPRT
TI  - Preliminary results on the organic geochemistry of the Oligocene Creede Formation, Colorado
AU  - Paul G. Lillis
PY  - 2001
DO  - 10.3133/ofr94260l
UR  - https://pubs.usgs.gov/publication/ofr94260L
ID  - ofr94260L
ER  -