4 unnumbered pages : color illustrations, color maps ; 28 cm
OCLC
ocm41947296
Caption title.
Shipping list no.: 1999-0297-P.
"June 1999"--P. [1].
"A computer model of regional ground-water flow developed by the USGS is used by the Virginia Department of Environmental Quality(DEQ) to permit new water-supply wells and to assess long-term stresses to the ground-water system"--P. [1].
Includes bibliographical references (page [4]).
Also available via Internet from the USGS Web site. Address as of 8/19/04: http://va.water.usgs.gov/online%5Fpubs/FCTSHT/Fs099-99/cpm2000.pdf; current access available via PURL.