http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Environmental characteristics and water quality of hydrologic benchmark network stations in the midwestern United States, 1963-95
x, 130 pages : illustrations, maps ; 28 cm.
Includes bibliographical references (pages 112-117).
U.S. Geological Survey circular ; 1173-B