Merkoša sitáhtat
APA-čujuhus (7. p.)
Estados Unidos Geological Survey. (19). Geologic map of copper range from Challenge to Winona, Michigan. Geological Survey.
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Chicago-čujuhus (17. p.)
Estados Unidos Geological Survey. Geologic Map of Copper Range from Challenge to Winona, Michigan. Geological Survey, 19.
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MLA-čujuhus (9. p.)
Estados Unidos Geological Survey. Geologic Map of Copper Range from Challenge to Winona, Michigan. Geological Survey, 19.
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