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Kihl, Mary, author.
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Iowa. Department of Transportation. Office of Transportation Research.
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Whited, John.
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Iowa. Office of Transportation Research.
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Cable, James K., 1941-
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Performing organization: Iowa Department of Transportation, Office of Transportation Research.
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Iowa. Department of Transportation. Office of Advance Planning.
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Office of Advance Planning, Planning and Research Division, Iowa Dept. of Transportation,
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Baumel, C. Phillip.
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Department of Transportation and the Iowa Highway Research Board, Iowa Department of Transportation Project
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