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Gravity and aeromagnetic studies of the Powder River Basin and surrounding areas, southeastern Montana, northeastern Wyoming, and western South Dakota
Gravity, aeromagnetic studies, Powder River Basin, Montana, Wyoming, South Dakota."
iv, 17 pages : illustrations, maps ; 28 cm.
"U.S. Department of the Interior, U.S. Geological Survey"--Title page verso.
Spine title: Gravity, aeromagnetic studies, Powder River Basin, Montana, Wyoming, South Dakota."."
Evolution of sedimentary basins--Powder River Basin ; ch. R
U.S. Geological Survey bulletin ; 1917-R