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Highway Research Board Bulletin, Issue 249, 9p
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Highway Research Board Bulletin, Issue 221, 4p
Highway Research Board Bulletin, Issue 169, 9p
Highway Research Board Bulletin, Issue 121, 5p
Highway Research Board Special Report, Issue 17
Highway Research Board Bulletin, Issue 38, pp 73-78
Highway Research Board Proceedings, Volume 23
Highway Research Board Roadside Development Committee Reports
Highway Research Board Roadside Development Committee Reports, 22 p.
Highway Research Board Proceedings, Volume 16
Highway Research Board Roadside Development Committee Reports, 15p
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