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Dyfyniad Arddull ChicagoChristie, A. W., and J. Prudhoe. Effects of a Lorry Control at Lymm, Cheshire. Crowthorne, Berk: Transport and Road Research Laboratory, 1980.
Dyfyniad MLAChristie, A. W., and J. Prudhoe. Effects of a Lorry Control at Lymm, Cheshire. Transport and Road Research Laboratory, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.