Oral history interview with Jerry Lawhorn concerning adaptations make to airplanes used by FWS, interviewed by Jim King and Bruce Conant. Tape transcription by: Mary E. Smith
Sanford R. Wilbur oral history interview with Mark Madison. Note that this appears to be a write-up of the interview by Dr. Madison, as it is not structured like a traditional interview, and Mr. Wilbur is referred to in the third person.