Hart, R.J., Taylor, H.E., Antweiler, R.C., Fisk, G.G.; Anderson, G.M., Roth, D.A., Flynn, M.E., Peart, D.B., Truini, Margot, and Barber, L.B., 2005, Physical and chemical characteristics of Knowles, Forgotten, and Moqui Canyons, and effects of recreational use on water quality, Lake Powell, Arizona and Utah: U. S. Geological Survey Scientific Investigations Report 2004-5120, 166p.