> Mehrbändiges Werk
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Geology and Nonfuel Mineral Deposits of Latin America and Canada by Charles G. Cunningham, Michael L. Zientek, Walter J. Bawiec, and Greta J. Orris
Reston, Va: U.S. Geological Survey, 2005
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Geology and nonfuel mineral deposits of the United States by Michael L. Zientek and Greta J. Orris
Reston, Va: U.S. Geological Survey, 2005