http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Design and implementation of a sampling strategy for a water-quality assessment of the Potomac River basin
31 pages : color illustrations, color maps ; 28 cm.
Includes bibliographical references (page 28).
Water-resources investigations report ; 96-4034