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Dyfyniad Arddull ChicagoChemistry: The Official Publication of American Chemical Society. [Washington, D.C: American Chemical Society], 1927.
Dyfyniad MLAChemistry: The Official Publication of American Chemical Society. American Chemical Society], 1927.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.