Title from title screen (viewed Feb. 2, 2016)., Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/)., Prepared in cooperation with U.S. Army Corps of Engineers, Walla Walla District., This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes., Includes bibliographical references (pages 40).
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