Map of the mineral regions of the counties of Gogebic and Ontonagon, Michigan, 1887; published by Edw. P. Allis & H.B. Merrell; compiled by Mess. J.M. Longyear and J.M. Case, Marquette, Mich.
Shows lands of Allis & Merrell in green, and of Case & Longyear in red. Also shows mines and mineral explorations, iron ranges, existing and projected railroads, wagon roads, and supply roads. Relief shown by hachures. "Supplement to the Mining, real estate & manufacturing reporter, Milwaukee, Wis., June 4th, 1887" --Upper margin. "Copyright applied for by Edw. P. Allis, Milwaukee, Wis." 1 map: color; 50 x 62 cm
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