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Dyfyniad APA
Estados Unidos Geological Survey. (19). Longitudinal sections of Pewabic Lode. U. S. Geological Survey.
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Estados Unidos Geological Survey. Longitudinal Sections of Pewabic Lode. U. S. Geological Survey, 19.
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Dyfyniad MLA
Estados Unidos Geological Survey. Longitudinal Sections of Pewabic Lode. U. S. Geological Survey, 19.
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