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Dyfyniad Arddull ChicagoGool, W. van. Fluorescence Centres in ZnS. [Eindhoven: Philips Research Laboratories, 1961.
Dyfyniad MLAGool, W. van. Fluorescence Centres in ZnS. Philips Research Laboratories, 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.