http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Establishment of sentinel sampling sites to monitor changes in water and sediment quality and biota related to visitor use at Lake Powell, Arizona and Utah, 2004-2006
1 online resource : color illustrations.
by Robert J. Hart, Howard E. Taylor, and G.M. Anderson ; prepared in cooperation with the National Park Service, Glen Canyon National Recreation Area.
Title from title screen (viewed on Apr. 5, 2013).
Glen Canyon National Recreation Area (Utah and Ariz.)
U.S. Geological Survey open-file report ; 2012-1237