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 new morse code manual / A.W. Eley Morse opleidingsapparaat AN/GSC-T1 - Koninklijke Landmacht Voorschrift, nr 1633 Morse seintoestel 7681 Leitfaden zur electrischen Telegraphie mit Ruhestrom : (System Morse) / J. Krämer Personal Papers in the Albert F.Simpson Historical Research Center / comp. and ed. by Richard E. Morse and Thomas C. Lobenstein Numbered USAF historical studies / prep. by the Albert F. Simpson Historical Research Center ; comp. and ed. by Richard E. Morse ... [et al.] Leichtetes System zur Erlernung der Morseschrift auf mnemotechnischem Wege / P. Benda Morse-Telegraphen-Lesebuch / F.O. Schönherr How to learn the morse code in thirty minutes and remember it / Ernest Nicholson Methods of operations research / Philip M. Morse and George E. Kimball
