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Dyfyniad Arddull ChicagoForstner.U and Wittmann. G.T.W. Metal Pollution in the Aquatic Environment. Berlin: Springer-Verlag, 1991.
Dyfyniad MLAForstner.U and Wittmann. G.T.W. Metal Pollution in the Aquatic Environment. Springer-Verlag, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.