If you want to get the FACTs about Butterfly FACs for yourself, this should get you started:

• Vietnam Air Losses – Chris Hobson – ISBN 978-1857801156
• Air Commando One – Warren A. Trest – ISBN 978-1560988076
• Apollo’s Warriors – Michael E. Haas – ISBN 978-1410200099
• The Ravens – The Men Who Flew Americas Secret War in Laos – ISBN 978-0964636002
• Special Air Warfare and the Secret War in Laos – Joseph D. Celeski – ISBN – 978-1079351712
• From A Dark Sky: The Story of U.S. Air Force Special Operations – Orr Kelly – ISBN – 978-0891415206
• Air Commando: Inside The Air Force Operations Command – Philip D. Chinnery – ISBN 978-031295881
• CCT @ Eye of the Storm – Albert Eugene Adcock
• CHECO “Lucky Tiger Combat Operations,” 15 June 1967
• CHECO “USAF Control of Airstrikes in Support of Indigenous Lao Ground Forces,” 19 July 1972
• Air America in Laos III – in Combat by Dr. Joe F. Leeker