Signal : Commercial telephone, telegraph and electric time service, general - USA Voorschrift, Army Regulations, No. 105-30 Operating practices for army administrative telephone switchboards - USA Voorschrift, Technical Manual, 24-210 technical manual Telephone repeater TP-14 - USA voorschrift Technical Manual 11-2007 Signal Training. Pamphlet no. 8. Signal Office Organization and Procedure. Part II. Procedure for Telephone Switchboard Operating. 1945 - Engeland Voorschrift Working Instructions. Telephone Sets F. High Power no. 1, Mk. II. WO 1024 - Engeland Voorschrift Telephone Terminal Set TC-21 (N) (Carrier) - USA Voorschrift, Technical Manual, 11-341 Working Instructions. Part I and II. Apparatus Carrier Telephone (1en 4). MK II. WO 939 - Engeland Voorschrift Working Instructions. Telephone Set. J. WO 1554 - Engeland Voorschrift Working Instructions. Telephone Set D MK V. WO 1529 - Engeland Voorschrift Working Instructions. Telephone Sets F. MKS I, I* & II. WO 1527 - Engeland Voorschrift Voorschrift voor de veldtelefoon. (The Soundpowered-telephone) - KNIL Voorschrift
