Key Transportation Indicators : Summary of a Workshop
National Research Council
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Measuring International Trade on U.S. Highways
National Research Council
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Polar Icebreaker Roles and U.S. Future Needs : A Preliminary Assessment
National Research Council
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State and Federal Standards for Mobile-Source Emissions
National Research Council
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Polar Icebreakers in a Changing World : An Assessment of U.S. Needs
National Research Council
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