Also available via Internet from the USGS Web site. Address as of 10/7/04: http://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470I/; current access is available via PURL.
System requirements: Pentium II or III class processor or equivalent systems in Linux, Macintosh, SunSPAR, HP 9000, or Silicon Graphics environments; Microsoft Windows 95, or Windows NT 3.5 or 4.0, or Windows 2000 system; 32 MB RAM; 17 MB hard disk space (plus graphic card needed for installation); Adobe Acrobat Reader, ARC/INFO.