General
HOPKINS, George E.
Flying the Line
The First Half Century of the Air Line Pilots Association
International Civil Aviation Organization
Airport Traffic 1994
Digest of Statistics No. 429
JACKSON, G. Gibbard
The Romance of Flight
History and development of flight to the date of first publication in 1929. Useful coverage of 1920s civil operations, including Imperial Airways, air mails and Croydon airport. Illustrated with photograph plates.
