Dunn, D. L.; Sjostrom, Keith J.; Leist, Rodney L. & Harmon, Thomas S., Jr. High-frequency acoustic imaging of L Lake Phase 4 [Savannah River Site, South Carolina], report, March 17, 1997; (https://digital.library.unt.edu/ark:/67531/metadc718823/m1/1/: accessed January 24, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .