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Highway Research Board Proceedings, Volume 39
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Highway Research Board Proceedings, Volume 36
Highway Research Board Proceedings, Volume 35
Highway Research Board Proceedings, Volume 34
Highway Research Board Bulletin, Issue 57
Highway Research Board Bulletin, Issue 36, pp 7-24
Highway Research Board Proceedings, Volume 29
Highway Research Board Proceedings, Volume 28
Highway Research Board Proceedings, Volume 23
Highway Research Board Proceedings, Volume 21
Rural Traffic Problems
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Highway Research Board Proceedings, Volume 5
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