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Paris: OECD, 1981
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Paris: OECD, 1979
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Paris: OECD Publ., 1972
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Paris: OECD, 1972
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Wien: Forschungsges. für d. Strassenwesen, [1986]
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Paris: OECD, c 1983
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Paris: OECD, c 1981
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Paris: OECD, 1978
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Paris: OECD, 1977
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Paris: OECD, 1973
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Paris: OECD, 1973
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Paris: Organisation for economic co-operation and development, 1975
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Paris: OECD, 1972
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Paris: OECD Publ., 1971
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Paris: OECD, 1971
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Paris: OECD, 1971
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Paris: OECD, 1972
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Paris: Organisation for Economic Co-Operation and Development, 1972
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(Paris: Organisation for Economic Co-operation and Development), 1969
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Paris: OECD, 1981