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Highway Research Record, Issue 220, 49p
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Highway Research Record, Issue 220, pp 20-28
Highway Research Record, Issue 220, pp 17-19
Highway Research Record, Issue 220, pp 29-49
Highway Research Record, Issue 220, pp 5-10
Highway Research Record, Issue 220, pp 11-16
Highway Research Record, Issue 220, pp 1-4
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