TY - RPRT TI - Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the south half of the Powder River basin, northeastern Wyoming AU - N.M. Denson AU - C. T. Pierson PY - 1991 DO - 10.3133/i2094b UR - https://pubs.usgs.gov/publication/i2094B ID - i2094B ER -