Hampson, P.S., Treece, M.W. Jr., Johnson, G.C., Ahlstedt, S.A., and Connell, J.F., 2000, Water Quality in the Upper Tennessee River Basin, Tennessee, North Carolina, Virginia, and Georgia 199498: U.S. Geological Survey Circular 1205, 32 p., on-line at https://pubs.water.usgs.gov/circ1205/