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Highway Research Board Bulletin, Issue 21, pp 10-14
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Highway Research Board Roadside Development Committee Reports
Highway Research Board Proceedings, Volume 28
Highway Research Board Research Reports, Issue 5B, 66p
Highway Research Board Research Reports, Issue 5B, 87p
Highway Research Board Proceedings, Volume 27
Highway Research Board Bulletin, Issue 8
Highway Research Board Proceedings, Volume 26
Highway Research Board Current Road Problems, Issue 12
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Highway Research Board Proceedings, Volume 25
Highway Research Board Proceedings, Volume 24
Highway Research Board Proceedings, Volume 23
Highway Research Board Proceedings, Volume 21
Highway Research Board Proceedings, Volume 20
Highway Research Board Proceedings, Volume 18
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