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Highway Research Record, Issue 168, pp 1-11
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Highway Research Circular, Issue 16
Highway Research Record, Issue 6, pp 71-75
Highway Research Board Bulletin, Issue 206
Highway Research Board Bulletin, Issue 218
Highway Research Board Proceedings, Volume 33
Highway Research Board Proceedings, Volume 21
Highway Research Board Proceedings, Volume 20
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Highway Research Board Roadside Development Committee Reports
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