1. Http://www.nielsenmedia.com/newsreleases/releases/1999/ netratings2.html. Accessed August 2000
2. Http://www.infoworld.com/cgi-bin/displayStory.pl?/features/990510mids.htm. Accessed August 2000
3. Http://www.ou.edu/oupd/inetmenu.htm. Accessed August 2000