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Paris: OECD, 2010
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Paris: OECD, 2009
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Paris: OECD, 2006 ; Paris: European Conference of Ministers of Transport, 2006
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Paris: European Conference of Ministers of Transport, 2007 ; Paris: OECD, 2007
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Paris: European Conference of Ministers of Transport, 2007 ; Paris: OECD, 2007
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Paris: OECD/ITF, c2010
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Paris: OECD Publ., 2008
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Paris: OECD, 2007
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Paris: OECD, 2007
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Paris: OECD, 2006
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Paris: OECD, 2006
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Paris: European Conference of Ministers of Transport, 2007 ; Paris: OECD, 2007
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Paris: OECD, 2007
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Paris: [Verlag nicht ermittelbar], 2007-2010 / 2007 - 2010
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Paris, France: OECD, 2007
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Paris: OECD Publishing, 2010
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Paris: OECD Publishing, 2010
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Paris: OECD Publishing, 2009
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Paris: OECD Publishing, 2009
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Paris: OECD Publishing, 2007