0:00-19:08 John Timmerman (1995) 19:08-21:48 Dr. Richard Haines (2000) 21:48-38:48 Dr. Richard Haines (1994) 38:53-49:27 Wendelle C. Stevens (1996) THIS VIDEO IS FOR EDUCATIONAL PURPOSE ONLY! FAIR USE PRINCIPLES UNDER SECTION 107 OF THE COPYRIGHT ACT. If you appreciate the content on my channel and would like to support me, please visit: https://www.buymeacoffee.com/eyesoncineW Thanks, EOC