Lamp, signalling, daylight - Engeland Voorschrift, 26/Manuals/9 Signal training : (all arms) / the War Office - Engeland Voorschrift, 26/Manuals/302 Power supply for field wireless sets - Engeland Voorschrift, 26/Manuals/81 Organization and inter-communication in the field - Engeland Voorschrift, 26/Manuals/90 Construction and maintenance of lines (War Office) - Engeland Voorschrift, 26/Manuals/381
