http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Ground-water age dating and other tools used to assess land-use effects on water quality
Ground water age dating and other tools used to assess land-use effects on water quality
1 folded sheet (6 pages) : color illustrations, color maps ; 28 cm.
Includes bibliographical references (page 6).
Water-resources investigations report ; 97-4150