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Highway Research Board Proceedings, Volume 33
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Highway Research Board Bulletin, Issue 57
Highway Research Board Bulletin, Issue 36, 28p
Highway Research Board Bulletin, Issue 35, pp 80-89
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 24
Highway Research Board Proceedings, Volume 23
Highway Research Board Proceedings, Volume 22
Highway Research Board Proceedings, Volume 21
Rural Traffic Problems
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Highway Research Board Proceedings, Volume 5
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