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1
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2Published 1982“...Road Research Unit occasional paper...”
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4Published 1982“...Road Research Unit occasional paper...”
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7Published 1982“...Road Research Unit occasional paper...”
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10Published 1979“...Road Research Unit occasional paper...”
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12Published 1982“...Road Research Unit occasional paper...”
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14Published 1988“...Road Research Unit occasional paper...”
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17Published 1990“...Road Research Unit occasional paper...”
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20