http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
flow-simulation model of the tidal Potomac River
Flow simulation model of the tidal Potomac River
vi, 41 pages : illustrations, maps ; 28 cm.
Water-quality study of the tidal Potomac River and Estuary
U.S. Geological Survey water-supply paper ; 2234-D