http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Quality of surface waters of the United States, 1966
Hudson Bay and Upper Mississippi River Basins, and Missouri River Basin
1 online resource (xiii, 666 pages) : maps.
Includes bibliographical references and index.
Geological Survey water-supply paper ; 1993