Reston, VA : U.S. Dept. of the Interior, U.S. Geological Survey, [2002]
Physical Description
1 online resource
Notes
Caption title.
"June 2002."
Other formats
Also available via Internet from theUSGS Web site. Address as of 11/10/04: http://erg.usgs.gov/isb/pubs/factsheets/fs06002.html; current access available via PURL.