http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Century-scale perspective on water quality in selected river basins of the conterminous United States
National Water-Quality Assessment Program (U.S.)
1 online resource (viii, 108 pages) : illustrations.
Title from title screen (viewed Jan. 9, 2015).
"National Water-Quality Assessment Program."
Includes bibliographical references (pages 99-107).
Scientific investigations report ; 2012-5225