49 resultados para Recreational trips.
em University of Michigan
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Transportation Department, Office of University Research, Washington, D.C.
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Mode of access: Internet.
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D also available in microfiche.
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Mode of access: Internet.
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National Highway Traffic Safety Administration, Washington, D.C.
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Mode of access: Internet.
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Contract no. DOT-CG-40672-A.
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"NPS D-3A"--P. [3] of cover.
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Federal Highway Administration, Office of Research, Washington, D.C.
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Coast Guard, Washington, D.C.
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"August 2010."
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Federal Highway Administration, Highway Statistics Division, Washington, D.C.