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Dyfyniad Arddull Chicagoebrary, Inc, and George Wesley Poling. Underwater Tailing Placement at Island Copper Mine: A Success Story. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration, 2002.
Dyfyniad MLAebrary, Inc, and George Wesley Poling. Underwater Tailing Placement at Island Copper Mine: A Success Story. Society for Mining, Metallurgy, and Exploration, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.