AWM81 39 PART 3 - [British Ministry of Home Security:] Air Raid Precautions Department. Circulars [on Civil Defence matters in Great Britain] 3 Nov 1939 - 30 Dec 1939
Official Record AWM2022.1750.101 Second World War, 1939-1945AWM81 39 PART 3 - [British Ministry of Home Security:] Air Raid Precautions Department. Circulars [on Civil Defence matters in Great Britain] 3 Nov 1939 - 30 Dec 1939