Description
Item Description:Title from title screen (viewed Aug. 17, 2004).
Electronic resource.
Format: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.
Bibliography:Includes bibliographical references.