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NCHRP Research Results Digest, Issue 101, 7 p.
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Transportation Research Record, Issue 651, pp 39-42
Highway Research Record, Issue 173, pp 55-62
Highway Research Record, Issue 171, pp 1-13
Highway Research Record, Issue 136, pp 31-41
Highway Research Record, Issue 136, pp 42-58
Highway Research Record, Issue 136, pp 59-77
Highway Research Record, Issue 136, pp 1-6
Highway Research Record, Issue 95, pp 71-110
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