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Dyfyniad Arddull ChicagoHardy, Douglas Lee. The Distribution of Automobiles in the United States and Japan. London: University Microfilms International, 1974.
Dyfyniad MLAHardy, Douglas Lee. The Distribution of Automobiles in the United States and Japan. London: University Microfilms International, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.