At head of title: Geological and Natural History Survey of Minnesota.; Relief shown by hachures.; Includes inset: Map of the silver mining region, Thunder Bay District, Canada., on sheet 87 x 122 Centimeters
Creator
Winchell, N. H. (Newton Horace), 1839-1914
Publisher
publisher not identified (United States)
Date Issued
1890
Rights
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Winchell, N. H. (Newton Horace), 1839-1914 (1890). Geological map of the iron regions of Minnesota. publisher not identified (United States). https://umedia.lib.umn.edu/item/p16022coll247:373 (map)