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Highway Research Board Bulletin, Issue 30, pp 29-41
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Highway Research Board Bulletin, Issue 30, pp 44-46
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Highway Research Board Proceedings, Volume 29
Highway Research Board Roadside Development Committee Reports
Highway Research Abstracts
Highway Research Board Proceedings, Volume 28
Highway Research Board Research Reports, Issue 6B, 13p
Highway Research Board Bulletin, Issue 17, pp 12-14
Highway Research Board Bulletin, Issue 17, pp 3-11
Highway Research Board Research Reports, Issue 5B, 66p
Highway Research Board Proceedings, Volume 26
Highway Research Board Proceedings, Volume 24
Highway Research Board Proceedings, Volume 23
Highway Research Board Proceedings, Volume 20
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