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Dyfyniad Arddull ChicagoThayer, John. Envrionmental Chemistry of the Heavy Clements: Hydro and Orfano Compounds. New York: V C H, 1995.
Dyfyniad MLAThayer, John. Envrionmental Chemistry of the Heavy Clements: Hydro and Orfano Compounds. V C H, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.