TY  - RPRT
TI  - Preliminary report on solid bitumens in Eocene rocks of Piceance Creek basin, northwestern Colorado
AU  - R. B. O'Sullivan
AU  - T.G. Ging
PY  - 1987
DO  - 10.3133/ofr87478
UR  - https://pubs.usgs.gov/publication/ofr87478
ID  - ofr87478
ER  -