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Estadoa Unidos Geological Survey. (19). Stratigraphic sections of the copper range, Michigan. Geological Survey.
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Dyfyniad Arddull Chicago
Estadoa Unidos Geological Survey. Stratigraphic Sections of the Copper Range, Michigan. Geological Survey, 19.
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Dyfyniad MLA
Estadoa Unidos Geological Survey. Stratigraphic Sections of the Copper Range, Michigan. Geological Survey, 19.
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