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1877 Parts of Western Wyoming, Southeastern I … Separate Map Parts of Western Wyoming, Southeastern I … |
1878 Parts of Western Wyoming and Southeaster … Separate Map Parts of Western Wyoming and Southeaster … |
1877 Part of Central Wyoming Separate Map Part of Central Wyoming. U.S. Geological … |
1877 Parts of Western Wyoming, Southeastern I … Separate Map Parts of Western Wyoming, Southeastern I … |