TY  - RPRT
TI  - Map showing contours on the top of the Pennsylvanian and Permian Minnelusa Formation and equivalents, Powder River basin, Wyoming and Montana
AU  - B.L. Crysdale
PY  - 1990
DO  - 10.3133/mf2140b
UR  - https://pubs.usgs.gov/publication/mf2140B
ID  - mf2140B
ER  -