Telegraph central office set TC-3 and switchboard BD-100 - USA Voorschrift, Technical Manual, 11-358 Telephone central office set TC-12 - USA Voorschrift, Technical Manual, 11-336 Telephone central office set TC-2 - USA Voorschrift, Technical Manual, 11-340 Radar search central AN/TPQ-1 - USA Voorschrift, Technical Manual, 11-1085 Telephone central office set TC-10 - USA Voorschrift, Technical Manual, 11-338 Telegraph central office set TC-3 - USA Voorschrift, Technical Manual, 11-358 Switchboard BD-96 : repair instructions operational requirements - USA Voorschrift, Technical Manual, 11-4314 Operating practices for army administrative telephone switchboards - USA Voorschrift, Technical Manual, 24-210