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Dyfyniad Arddull ChicagoHecht, Eugene. Theory and Problems of Optics. New York: Mc Graw - Hill, 1975.
Dyfyniad MLAHecht, Eugene. Theory and Problems of Optics. Mc Graw - Hill, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.