Links:
https://www.tracesofwar.com/sights/103473/Memorial-Dakota-FZ626.htm
https://www.tracesofwar.com/sights/28792/Waar-ligt-Crash-Site-Dakota-FZ626.htm
http://www.pegasusarchive.org/arnhem/alan_hartley.htm
https://www.facebook.com/Green-On-the-Story-of-Arnhem-Re-supply-976492119029398/?fref=mentions
Sources:
Van Hees, A. J. (2002). "Green on!", A detailed survey of the British parachute re-supply sorties during operation 'Market Garden'. Maastricht, A.J. van Hees
Berends, P. (2002). Een andere kijk op de slag om Arnhem, De snelle Duitse reactie. Soesterberg, Aspekt
Middlebrook, M (1994), Arnhem 1944 - The Airborne Battle, 17-26 september. Penguin Books Ltd