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Estados Unidos Geological Survey. (19). Longitudinal sections of Allouez conglomerate and Keweenaw mine. U. S. Geological Survey.
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Estados Unidos Geological Survey. Longitudinal Sections of Allouez Conglomerate and Keweenaw Mine. U. S. Geological Survey, 19.
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Estados Unidos Geological Survey. Longitudinal Sections of Allouez Conglomerate and Keweenaw Mine. U. S. Geological Survey, 19.
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