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Highway Research Board Proceedings, Volume 19
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Highway Research Board Proceedings, Volume 18
Rural Traffic Problems
Highway Research Board Proceedings, Volume 18, pp 359-361
Highway Research Board Proceedings, Volume 18, pp 90-99
Highway Research Board Proceedings, Volume 17
Highway Research Board Proceedings, Volume 16
Highway Research Board Proceedings, Volume 14, p. 123-130
Highway Research Board Proceedings, Volume 14
Highway Research Board Proceedings, Volume 13
Highway Research Board Proceedings, Volume 12
Highway Research Board Proceedings, Volume 9
Highway Research Board Proceedings, Volume 8
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