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2. Geologic map showing total thickness of coal in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
3. Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the south half of the Powder River Basin, northeastern Wyoming
4. Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
5. Geologic map showing configuration of the bedrock surface, North Platte 1⁰ x 2⁰ quadrangle, Nebraska
6. Geologic map of the Twin Buttes quadrangle, McKinley County, New Mexico
7. Geologic map of the Swisshelm Mountains, and a description of the development of the Swisshelm and Pedregosa Mountains, Cochise County, Arizona
8. Geologic map of the southern Sheep Range, Fossil Ridge, and Castle Rock area, Clark County, Nevada
9. Geologic map of the Portage quadrangle, Cascade and Choteau counties, Montana
10. Geologic map of the northwestern part of the Uncompahgre Uplift, Grand County, Utah, and Mesa County, Colorado, with emphasis on Proterozoic rocks
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