Indian Sappers removing electric fittings from Turkish telephone lines - With the troops in Mesopotamia Veldtelefoon TELEPHONE SET "L" Radar / American Telephone and Telegraph Co. Ontwerp-voorschrift voor de veldtelefoon (The soundpowered-telephone) - Koninklijke Landmacht Ontwerp-Voorschrift, No. 925 Telephone central office set TC-12 - USA Voorschrift, Technical Manual, 11-336 Telephone central office set TC-2 - USA Voorschrift, Technical Manual, 11-340 Common-battery telephone equipment - USA Voorschrift, Technical Manual, 11-458 Principles of long distance telephone and telegraph transmission - USA Voorschrift, Technical Manual, 11-475 Telephone repeater EE-89-A - USA Voorschrift, Technical Manual, 11-2006 Indian sappers laying telephone cables in trench Apparatus carrier telephone 1 + 1W Mark 1* and 1 + 1 C : issue nr. 1 use of field telephones in the field / A.G. Grinling
