Also available via Internet from GAO web site. Address as of 9/28/04: http://www.gao.gov/cgi-bin/getrpt?GAO-04-780; current access available via PURL.
Print version: United States. General Accounting Office. Critical infrastructure protection
Microfiche version: United States. General Accounting Office. Critical infrastructure protection [Bethesda, Md.] : ProQuest,[2004]