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Highway Research Record, Issue 251, pp 47-62
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Highway Research Record, Issue 251, pp 63-68
Highway Research Record, Issue 194, pp 96-102
Highway Research Record, Issue 166, pp 22-25
Highway Research Record, Issue 10, 12p
Highway Research Record, Issue 10, pp 21-34
Highway Research Board Bulletin, Issue 338, pp 81-99
Highway Research Board Bulletin, Issue 283, 7p
Highway Research Board Proceedings, Volume 21
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