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Estados Unidos Geological Survey. (19). Development of Minesota fissure and associated Lodes of Michigan mine. U. S. Geological Survey.
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Estados Unidos Geological Survey. Development of Minesota Fissure and Associated Lodes of Michigan Mine. U. S. Geological Survey, 19.
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Estados Unidos Geological Survey. Development of Minesota Fissure and Associated Lodes of Michigan Mine. U. S. Geological Survey, 19.
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