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Dyfyniad Arddull ChicagoBrotherton, M. Masers and Lasers: How They Work, What They Do. New York: McGraw-Hill, 1964.
Dyfyniad MLABrotherton, M. Masers and Lasers: How They Work, What They Do. McGraw-Hill, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.