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Dyfyniad Arddull ChicagoHellerman, Herbert. Digital Computer System Principles. 2nd ed. New Delhi: McGraw-Hill, 1974.
Dyfyniad MLAHellerman, Herbert. Digital Computer System Principles. 2nd ed. McGraw-Hill, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.