found: Its Annual report, 1989:cover (Ameritech) p. 1 (American Information Technologies Corporation)
found: S & P register, 1990:p. 133 (American Information Technologies Corporation (Ameritech))
found: SBC Ameritech web-site, Aug. 2, 2002(Ameritech announced on May 11, 1998, that it would merge with SBC Communications. The combined company will retain the SBC name, but promised to continue the use of the Ameritech name in each of Ameritech's operating states)
notfound: Near north residential white pages, 2001: cover (SBC Ameritech)
