Water quality and quantity of selected springs and seeps along the Colorado River corridor, Utah and Arizona: Arches National Park, Canyonlands National Park, Glen Canyon National Recreation Area, and Grand Canyon National Park, 1997-98 - Taylor, Howard; Spence, John; Antweiler, Ronald; Berghoff, Kevin; Plowman, Terry; Peart, Dale; Roth, David (Open-File Report, 2004)