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Highway Research Board Bulletin, Issue 42, pp 1-13
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Highway Research Board Roadside Development Committee Reports
Highway Research Board Proceedings, Volume 30
Highway Research Board Proceedings, Volume 29
Highway Research Board Bulletin, Issue 28, pp 2-16
Highway Research Board Roadside Development Committee Reports, 18p
Highway Research Abstracts
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Highway Research Board Proceedings, Volume 26
Highway Research Board Proceedings, Volume 24
Highway Research Board Proceedings, Volume 23
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