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Berlin: Erich Schmidt, 1991
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Berlin; Heidelberg: Springer, 2008
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Paris: OECD Publications Service, 1990
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Paris: OECD, 1998
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Heidelberg New York, N.Y.: Physica-Verl., 2000
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Paris: OECD, 2000
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Bonn: Kuron, 1995
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Paris: OECD Publishing and European Conference of Ministers of Transport, 1998
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Paris: OECD Publishing, 2000