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Highway Research Record, Issue 23, pp 7-18
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Highway Research Record, Issue 23, p 22-38
Highway Research Record, Issue 23, pp 47-49
Highway Research Board Special Report, Issue 75
Highway Research Board Special Report, Issue 72
Highway Research Board Bulletin, Issue 346, pp 27-40
Highway Research Board Proceedings, Volume 41
Highway Research Board Roadside Development Committee Reports
Highway Research Board Bulletin, Issue 190, 12p
Highway Research Board Bulletin, Issue 169, 9p
Highway Research Abstracts
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Highway Research Board Proceedings, Volume 26
Highway Research Board Proceedings, Volume 17
Highway Research Board Roadside Development Committee Reports, 15p
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