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Bruxelles: European Federation for Transport and Environment, 1994
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Bruxelles: European Federation for Transport and Environment, 1994
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Bruxelles: European Federation for Transport and Environment, 1993
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Bruxelles: European Federation for Transport and Environment, 1995
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Bruxelles: European Federation for Transport and Environment, 1995
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Paris: Organisation for Economic Co-operation and Development (OECD), Joint Transport Research Centre (JTRC), 2009
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Paris : OECD Publishing, 2009.
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Informa UK Limited, 2000
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Elsevier BV, 1997
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Elsevier BV, 2012