see http://www.northwealdairfieldhistory.org/ see http://www.controltowers.co.uk/N/North_Weald.htm see http://www.simplyplanes.co.uk/north_weald_airfield.shtml see http://battleofbritainblog.com/airfields/raf-north-weald/ see http://www.historylearningsite.co.uk/fighter_command_groups.htm
