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Citation Info Bayfield, Henry Wolsey, 1795-1885. Farmer, John, 1798-1859. Map of the states of Michigan and Wisconsin: embracing a great part of Iowa and Illinois, and the whole mineral region with a chart of the lakes. exhibiting the sections, the geological formations, and the general topography; compiled from the state topographical department, from the latest United States surveys, and from other authentic sources, by John Farmer of Detroit.; Alternate title: Geological map of the mineral region: from the official plate of the United States surveys and chart of Lake Superior reduced from the survey and chart of Lieut. Bayfield of the R.N.. [JPEG]. Retrieved from https://geo.nyu.edu/catalog/ad879b7d-a815-458a-aa35-c2d718c1b9bf