Title from title screen (viewed on Mar. 14, 2003).
"March 1996."
Includes bibliographical references.
System requirements: Adobe Acrobat Reader.
Mode of access: Internet at the USGS web site. Address as of 03/14/03: ftp://ftp.umesc.usgs.gov/pub/media%5Farchives/documents/reports/1995/95p00806.pdf; current access available via PURL.