1. Speech Examination Study. February 4, 1990;National Transportation Safety Board,1990
2. Speech Examination Study Addendum, June 18, 1990;National Transportation Safety Board,1990
3. Review of NTSB Reports, Re: Effects of Alcohol on Speech;Hollien,1990
4. J. Hazelwood, Statements made during interviews with Connie Chung, Face-to-Face, CBS News, New York. There are two slightly different interviews: March 31, 1990 and August 20, 1990.
5. Effects of alcohol on the speech of non-alcoholics;Andrews;Cent. States Speech J.,1977