http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Water-Quality Assessment Program (U.S.)
1 online resource (1 sheet (2 unnumbered pages)) : color illustrations, color map.
At head of title: National Water-Quality Assessment.
Includes bibliographical references (page 2).
Southeast Stream Quality Assessment (U.S.)
Fact sheet (Geological Survey (U.S.)) ; 2014-3023