TY  - RPRT
TI  - Isopach, structure contour, and resource maps of the R-6 oil-shale zone, Green River Formation, Piceance Creek basin, Colorado
AU  - Janet K. Pitman
PY  - 1979
DO  - 10.3133/mf1069
UR  - https://pubs.usgs.gov/publication/mf1069
ID  - mf1069
ER  -