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Highway Research Board Bulletin, Issue 34, pp 21-40
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Highway Research Board Roadside Development Committee Reports
Highway Research Board Proceedings, Volume 30
Highway Research Board Bulletin, Issue 26, 127p
Highway Research Board Proceedings, Volume 29
Highway Research Board Bulletin, Issue 23, pp 12-17
Highway Research Board Bulletin, Issue 23, pp 1-11
Highway Research Board Bulletin, Issue 21, pp 7-9
Highway Research Board Bulletin, Issue 21, pp 1-6
Highway Research Board Research Reports, Issue 7B, 4p
Highway Research Board Bulletin, Issue 18
Highway Research Board Proceedings, Volume 28
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