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Highway Research Board Special Report, Issue 2
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Highway Research Board Bulletin, Issue 38, pp 68-72
Highway Research Board Proceedings, Volume 30
Highway Research Abstracts
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Highway Research Board Bulletin, Issue 18
Highway Research Board Proceedings, Volume 28
Highway Research Board Proceedings, Volume 21
Highway Research Board Proceedings, Volume 20
Highway Research Board Proceedings, Volume 18
Highway Research Board Proceedings, Volume 17
Highway Research Board Proceedings, Volume 7
Highway Research Board Proceedings, Volume 6
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