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Dyfyniad Arddull ChicagoMeersman, Hilde [ed.], Eddy Van de Voorde [ed.], and Willy Winkelmans [ed.]. World Transport Research: Proceeding of the 8th World Conference on Transport Research. Amsterdam: Pergamon, 1999.
Dyfyniad MLAMeersman, Hilde [ed.], et al. World Transport Research: Proceeding of the 8th World Conference on Transport Research. Pergamon, 1999.
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