The following sources are gratefully acknowledged.

Notes compiled by Eric Favelle
Notes compiled by Gordon Reid
Notes compiled by Ron Cuskelly
"Aviation Letter" (Lundkvist Aviation Research) [Ref AL in table]
"Qantas Commemorative Airmails" by Peter A. Turner (Privately published) 1992 [Ref PAT in table]
"Airliner Production List" by Nigel M. Tomkins & Ricky-Dene Halliday (Aviation Data Centre) various issues
"The Civil Aircraft Registers of Great Britain 1919-1985" by John Appleton (The Aviation Hobby Shop) 1986
"The Historic Civil Aircraft Register of Australia VH-EAA to VH-EZZ" by Tony Arbon and David Sparrow (AustAirData)
"Wings to the World" by Sir Hudson Fysh (Angus & Robertson) 1970 [Ref WTW in table]
"High Corridors" by John Gunn (University of Queensland Press) 1988
"The Boeing 707 & 720" (Air-Britain Historians) 1972
"Boeing Aircraft Since 1916" by Peter M. Bowers (Putnam) 1966
"Airliners in Australian Service Vol. 1" by Eric Allen (Aerospace Publications) 1995
"Boeing 707, Douglas DC-8 & Vickers VC-10" by Stewart Wilson (Aerospace Publications) 1998
"Bulletin 707" by Hurturk Aviation Information Services Inc [Ref HAI in table]
"World Directory of Airliner Crashes" by Terry Denham (Patrick Stephens Ltd) 1996
"British Independent Airlines since 1946" by A.C. Merton Jones (LAAS & MAS) 1976
Boeing 707 Database maintained online by Servaas Verbrugge
"Where Are They Now?" Database maintained by David Bromage
jetphotos.net Database
Joint-STARS www.globalsecurity.org