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?t=t&id=57566662 Geological map of the district between Portage Lake and Montreal River, Lake Superior, Michigan / J.W. Foster & J.D. Whitney, U.S. geologists ; S.W. Hill & W. Schlatter, assistants.
From Michigan (In 5 layers) Depicts: 1849 Last modified about 2 years ago. Unrectified.
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