http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Summary appraisals of the Nation's ground-water resources
1 online resource (vi, U32 pages) : illustrations, maps + 2 plates.
by Fernando Gómez-Gómez and James E. Heisel.
Includes bibliographical references (pages U31-U32).
Summary appraisals of the Nation's ground-water resources--Caribbean region
Geological Survey professional paper ; 813-U