http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tracking and forecasting the nation's water quality
1 online resource (6 unnumbered pages) : colored illustrations, maps.
[by Gary L. Rowe Jr., Robert J. Gilliom, and Michael D. Woodside.]
Title from title screen (viewed on March 26, 2013).
At head of title: National Water-Quality Assessment Program.
Includes bibliographical references (page [6]).
National Water-Quality Assessment Program (U.S.)
Fact sheet (Geological Survey (U.S.)) ; 2013-3008