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Highway Research Circular, Issue 60
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Highway Research Circular, Issue 56
Highway Research Circular, Issue 27
Highway Research Record, Issue 123, pp 1-16
Highway Research Record, Issue 58, pp 21-32
Highway Research Board Bulletin, Issue 152, 12p
Highway Research Board Roadside Development Committee Reports
Highway Research Board Proceedings, Volume 29
Highway Research Board Proceedings, Volume 17
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