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Washington, DC: U.S. Department of Transportation, Assistant Secretary for Policy and International Affairs, 1980
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Wiesbaden: Springer VS, [2016]
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Washington, DC, 2010
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Stuttgart: Institut für Straßen- und Verkehrswesen, Universität Stuttgart, 2019
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World Bank, Washington, DC, 2000
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World Bank, Washington, DC, 2000
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Luxembourg: ESPON EGTC, [2022]
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World Bank, Washington, DC, 2014
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World Bank, Washington, DC, 2010
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World Bank, Washington, DC, 2014
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Elsevier BV, 2021
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SAGE Publications, 2009
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Springer Science and Business Media LLC, 2006
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SAGE Publications, 2004