History
JACKSON, Robert
The Secret Squadrons - Special Duty Units of the RAF and USAAF in the Second World War
JONES, R.V.
The Intelligence War and the Royal Air Force
The Proceedings of the Royal Air Force Historical Association No. 1 - January, 1987
KERR, George P.
Time's Forelock
A Record of Shell's Contribution to Aviation in the Second World War
KONIAREK, Dr. Jan
Polish Air Force 1939 - 1945
Squadron/Signal Publications Aircraft Special no. 6064