Columbia, SC : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor], 2003
System requirements: Adobe Acrobat Reader (available free).
Mode of access: Internet at the USGS web site. Address as of 08/17/04: http://water.usgs.gov/pubs/wri/wri034092/pdf/WRIR-03-4092.pdf; current access available via PURL.