Emissions reductions from inspection and maintenance : Vancouver versus Portland snapshot / by Michael, R. Bruce

Subjects: “…Automobiles Motors Exhaust gas Oregon Portland.…”
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The Portland study / by Ashby, H. Anthony

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Approaches to analyzing data from the Portland study : final report / by Lai, Larry S. L., Gins, John D., United States. Environmental Protection Agency. Characterization and Application Branch

Subjects: “…Automobiles Motors Exhaust gas Oregon Portland.…”
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Portland study : first preliminary data analysis / by Becker, Janet

Subjects: “…Automobiles Motors Exhaust gas Oregon Portland.…”
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Portland study element /

Subjects: “…Automobiles Motors Exhaust gas Oregon Portland Measurement.…”
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Malheur National Wildlife Refuge Blitzen Valley auto tour / by U.S. Fish and Wildlife Service

Subjects: “…Automobile travel Oregon Malheur National Wildlife Refuge.…”
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Scenic routes & byways. by Barr, Leonard T. (Leonard Tom), PALCI EBSCO books

Subjects: “…Automobile travel Oregon Guidebooks.…”
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Cascade Lakes National Scenic Byway tour of interpretive sites : welcome to central Oregon's high country. by United States. Forest Service, United States. Federal Highway Administration

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Evaluation of Oregon's graduated driver licensing program by United States. National Highway Traffic Safety Administration

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