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Highway Research Board Bulletin, Issue 6, pp 7-14
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Highway Research Abstracts
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Highway Research Board Proceedings, Volume 26
Highway Research Board Proceedings, Volume 25
Highway Research Board Research Reports, Issue 1d, 42p
Highway Research Board Research Reports, Issue 1d, 10p
Highway Research Board Proceedings, Volume 24
Highway Research Board Proceedings, Volume 23
Highway Research Board Wartime Road Problems, Issue 6, 16p
Highway Research Board Roadside Development Committee Reports
Highway Research Board Proceedings, Volume 22
Highway Research Board Proceedings, Volume 21
Highway Research Board Proceedings, Volume 20
Highway Research Board Proceedings, Volume 19
Rural Traffic Problems
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