http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Hydrogeology and water quality of the Catoctin Mountain National Park Area, Frederick County, Maryland
1 online resource (v, 41 pages) : illustrations, maps.
by Thomas J. Trombley and Linda D. Zynjuk.
"Prepared in cooperation with the National Park Service."
Includes bibliographical references (page 41).
Water-resources investigations report ; 85-4241