1876. Winchell, N. H. (Newton Horace), 1839-1914. "The fifth annual report of the Geological and Natural History Survey of Minnesota"-- upper right margin.; Relief shown by hachures.; Shows railroa... publisher not identified (United States).
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1877. Winchell, N. H. (Newton Horace), 1839-1914. "Geological and Natural History Survey of Minnesota."; Relief shown by hachures.; Shows county boundaries, city boundaries, roads, finished railroa... Photo. Eng. Co (New York).
1877. Sperry, L. B. "Geological and Natural History Survey of Minnesota. Report of 1877." -- upper left.; Includes townships, ranges, and sections. 32 x 37 Centimeters... Photo Engraving Co (New York).
1890. Winchell, N. H. (Newton Horace), 1839-1914. At head of title: Geological and Natural History Survey of Minnesota.; Relief shown by hachures.; Includes inset: Map of the silver mining region, ... publisher not identified (United States).
1968. Chart of Geological Sections 1-6 prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scal... Wallace, McHarg, Roberts and Todd.
1968. Chart of Geological Sections A-F prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scal... Wallace, McHarg, Roberts and Todd.
1987. McSwiggen, Peter L. Bedrock geology interpretatons and geophysical data interpretations in east-central Minnesota, scale 1:48,000. Minnesota Geological Survey.
1968. Machamer, J.F. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of 17th level of Zenith Mine, scale 1 i... Minnesota Geological Survey.
1968. Machamer, J.F. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of 18th level of Zenith Mine, scale 1 i... Minnesota Geological Survey.
1968. Machamer, J.F. Geology cross section diagrams of Zenith Mine, scale 1 inch = about 100 feet. Minnesota Geological Survey.