The Signal Service in the European War of 1914-1918 (France) (1921)
Priestley, Raymond Edward, 1886- · Chatham : W. & J. Mackay & co.,limited · leaf 410
PRECAUTIONS AGAINST ENEMY OVERHEARING IN 1915. PlATE XII, … I poralltL to tnemy Un«) is Qrtaler IKm \i>l( CD Socirtmt U «idi lutolUc m Jir (!• B- d) MiWUt to kijiHa tki tOO^art ti«i. Metallic T»i« CobU Sujlc Coklt
Great Britain. Army. Royal Engineers. Signal Service · World War, 1914-1918 -- Great Britain · Signals and signaling
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