66 H. P. Browning, "The Application of Teletypewriters to Military Signaling," Signal Corps Bulletin 78 (May-Jun 1934): 28-40 (reprinted in Scheips, ed., Military Signal Communications, vol. 2); Paul J. Scheips, "Introduction," in Scheips, ed., Military Signal Communications, vol. 1; Terrett, Emergency, pp. 178, 232-33.