Last, George V.; Winsor, Kelsey & Unwin, Stephen D. A Summary of Information on the Behavior of the Yakima Fold Belt as a Structural Entity -- Topical Report, report, August 1, 2012; (https://digital.library.unt.edu/ark:/67531/metadc843319/m1/1/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .