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Author Wright, Thomas L. (Thomas Llewellyn), 1935-
Title Chemical data for flows and feeder dikes of the Yakima Basalt Subgroup, Columbia River Basalt Group, Washington, Oregon, and Idaho, and their bearing on a petrogenetic model / by Thomas L. Wright, Margaret Mangan, and Donald A. Swanson.
Imprint [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1989.
Washington : United States Government Printing Office.

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