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Dyfyniad Arddull ChicagoGernsback, Hugo. Science and Invention in Pictures. [New York: Experimenter Pub. Co.], 1924.
Dyfyniad MLAGernsback, Hugo. Science and Invention in Pictures. Experimenter Pub. Co.], 1924.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.