Also available via Internet from the USGS web site. Address as of 8/5/02: http://greenwood.cr.usgs.gov/pub/dds/dds-066; current access is available via PURL.
Adobe Acrobat Reader available on disc.
System requirements: i486 or Pentium processor-based PC; 8MB of RAM on Windows 95 and Windows 98 (16MB recommended); 16MB of RAM on Windows NT (24MB recommended); 10MB of available hard disk space; Microsoft Windows 95, Windows 98, or Windows NT 4.0 with Service Pack 3 or later.