TY  - RPRT
TI  - Geologic map showing thickness of sedimentary rocks from ground surface to the top of the upper Cretaceous Pierre Shale in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
AU  - N.M. Denson
AU  - C. T. Pierson
AU  - W.D. Gundy
PY  - 1994
DO  - 10.3133/i2433a
UR  - https://pubs.usgs.gov/publication/i2433A
ID  - i2433A
ER  -