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Dyfyniad Arddull ChicagoShashoua, Yvonne. Conservation of Plastics: :materials Science, Degradation and Preservation. Armsterdam: Elsevier, 2008.
Dyfyniad MLAShashoua, Yvonne. Conservation of Plastics: :materials Science, Degradation and Preservation. Elsevier, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.