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Dyfyniad Arddull ChicagoHumphrey, Thomas F. Uniformity Efforts in Oversize/overweight Permits. Washington, D.C: Transportation Research Board, National Research Council, 1988.
Dyfyniad MLAHumphrey, Thomas F. Uniformity Efforts in Oversize/overweight Permits. Transportation Research Board, National Research Council, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.