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Highway Research Record, Issue 366, pp 1-19
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Highway Research Record, Issue 323, pp 14-25
Highway Research Record, Issue 257
Highway Research Record, Issue 83, pp 29-44
Highway Research Record, Issue 84, pp 16-33
Highway Research Record, Issue 89, pp 39-46
Highway Research Board Bulletin, Issue 330, pp 40-51
Highway Research Board Special Report, Issue 73
Highway Research Board Special Report, Issue 66
Highway Research Board Bulletin, Issue 244, 10p
Highway Research Board Proceedings, Volume 39
Highway Research Board Bulletin, Issue 228, 7p
Highway Research Board Bulletin, Issue 195
Highway Research Board Proceedings, Volume 33
Highway Research Board Proceedings, Volume 32
Highway Research Board Proceedings, Volume 31
Highway Research Abstracts
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Highway Research Board Bulletin, Issue 17, pp 12-14
Rural Traffic Problems
Highway Research Board Proceedings, Volume 17
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