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3Published 1980“...U.S. Geological Survey,...”
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15Published 1982“...U.S. Geological Survey,...”
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19Published 1990“...U.S. Geological Survey :...”
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20Preliminary geologic map of the Dolph quadrangle, Lincoln, Tillamook, and Yamhill counties, Oregon /Published 1991“...U.S. Geological Survey ;...”
Government Document Microform Map