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Dyfyniad Arddull ChicagoFergusson, J. E. Inorganic Chemistry and the Earth. Oxford: Pergamon Press, 1982.
Dyfyniad MLAFergusson, J. E. Inorganic Chemistry and the Earth. Pergamon Press, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.