Thiesfeld, Steven L.; McPeak, Ronald H.; McNamara, Brian S. (Washington Department of Fish and Wildlife) & Honanie, Isadore (Confederated Tribes and Bands, Yakama Nation). Bull Trout Population Assessment in the White Salmon and Klickitat Rivers, Columbia River Gorge, Washington, 2001 Annual Report., report, January 1, 2002; (https://digital.library.unt.edu/ark:/67531/metadc735817/m1/1/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .