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Estados Unidos Geological Survey. (19). General geologic map from Presque isle river to Victoria mine, Michigan. U. S. Geological Survey.
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Estados Unidos Geological Survey. General Geologic Map from Presque Isle River to Victoria Mine, Michigan. U. S. Geological Survey, 19.
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Estados Unidos Geological Survey. General Geologic Map from Presque Isle River to Victoria Mine, Michigan. U. S. Geological Survey, 19.
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