http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aqueous geochemistry of the Magothy aquifer, Maryland
iv, 28 pages : illustrations, maps ; 28 cm.
by LeRoy L. Knobel and Scott W. Phillips.
U.S. Geological Survey water-supply paper ; 2323