TY  - RPRT
TI  - Cross sections showing coal stratigraphy of the central Powder River basin, Wyoming and Montana
AU  - C. L. Molnia
AU  - F. W. Pierce
PY  - 1992
DO  - 10.3133/i1959d
UR  - https://pubs.usgs.gov/publication/i1959D
ID  - i1959D
ER  -