188 resultados para Erosion on rural roads

em University of Michigan


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Federal Highway Administration, Office of Research, Washington, D.C.

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Federal Highway Administration, Office of Research and Development, Washington, D.C.

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Federal Highway Administration, Washington, D.C.

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Mode of access: Internet.

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Federal Highway Administration, Office of Highway Planning, Washington, D.C.

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Federal Highway Administration, Office of Research and Development, Washington, D.C.

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"PN-AAJ-607"--Cover.

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Bibliographical footnotes.

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Rocq

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Transportation Department, Secretary of Transportation, Washington, D.C.

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National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

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Urban Mass Transportation Administration, Washington, D.C.

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Transportation Department, Office of University Research, Washington, D.C.