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London [u.a.]: Routledge, 1992
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Cheltenham, UK; Northampton, MA: Edward Elgar, [2014]
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London: Paul Chapman Publ., 1998
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Baden-Baden: Nomos-Verl.-Ges., 1994
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Paris: OECD Publ., 1988
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Aldershot [u.a.]: Avebury [u.a.], 1996
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Aldershot, Hants [u.a.]: Gower, 1985
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Münster: Lit, 2003
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Cheltenham, UK; Northamton, MA, USA: Edward Elgar, 2014
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Paris: International Transport Forum, September 2016