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The Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Geologic map of the Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Pleistocene drift borders and diversion channels in and adjacent to the Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Sections of coal beds in T. 141 N., RS. 83-87 W., Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Sections of coal beds in T. 142 N., RS. 82-87 W., Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Sections of coal beds in T. 143 N., RS. 82-87 W., Square Buttes coal field, Oliver and Mercer Counties, North Dakota | Sections of coal beds in T. 144 N., RS. 83-87 W., Square Buttes coal field, Oliver and Mercer Counties, North Dakota

1959

Johnson, William D. | Kunkel, Robert P. (Robert Paul)



2024-02-27
2025-07-19
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