Isopach map of the interval from surface elevation to the top of the Pennsylvanian and Permian Minnelusa Formation and equivalents, Powder River Basin, Wyoming and Montana [cartographic material] / Department of the Interior, U.S. Geological Survey ; by Bonnie L. Crysdale

Corporate Author:: Geological Survey (U.S.)
Published:: Reston, Va. : The Survey, 1990.
Denver, CO : For sale by Map Distribution.
Physical Description:: 1 map ; 72 x 58 cm, on sheet 86 x 112 cm, folded in envelope 30 x 24 cm.
Additional Creators:: Crysdale, Bonnie L.