Morse seintoestel 7681 International Morse Code Morse sleutel van de 1e Divisie 7 December Rotary Engines of World War One This is it Fly with the RAF, deel 1, Initial Training Wing TD-1011 Fokker C.X Kopie van tekening A18331: Morse key base plate; p/o 38765 vervangt 38765F Leitfaden zur electrischen Telegraphie mit Ruhestrom : (System Morse) / J. Krämer new morse code manual / A.W. Eley Methods of operations research / Philip M. Morse and George E. Kimball How to learn the morse code in thirty minutes and remember it / Ernest Nicholson Personal Papers in the Albert F.Simpson Historical Research Center / comp. and ed. by Richard E. Morse and Thomas C. Lobenstein
