Description
Item Description:Title from title screen (viewed on May 28, 2003).
Electronic resource.
Format:System requirements: Adobe Acrobat Reader.
Mode of access: Internet from the USGS web site. Address as of 5/28/03: http://water.usgs.gov/pubs/wri/wri034022/pdf/wri034022.pdf; current access is available via PURL.
Bibliography:Includes bibliographical references.