Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the south half of the Powder River Basin, northeastern Wyoming / Department of the Interior, U.S. Geological Survey ; by N.M. Denson and C.T. Pierson
Series Titles:
Miscellaneous investigations series ; map I-2094-B Miscellaneous investigations series (Geological Survey (U.S.)) ; I-2094-B.