Mode of access: Internet from the USGS web site. Address as of 8/7/08: http://pubs.usgs.gov/fs/2004/3143/fs2004%5F3143.pdf; current access available via PURL.
Note
Title from title screen (viewed on Aug. 7, 2008).
"December 2004."
"Gulf Coast Geology (GCG) Online is a Geographic Information System (GIS) database developed using map service technologies"--P. [1].