AWM81 68 - [British Ministry of Supply:] Passive Air Defence. Technical memoranda. [Protection of plant and personnel in factories, power stations, etc; Lighting standards for vital factories; Pilot lighting for evacuation of personnel; Siting of shelters and emergency protection; New shelter construction; Fire precautions; Treatment of roof lights and wall lights; Protective walls, fire precautions - structural measures for limiting and preventing fires in roofs, etc; Fire precautions - structu
Official Record AWM2022.1750.187 Second World War, 1939-1945AWM81 68 - [British Ministry of Supply:] Passive Air Defence. Technical memoranda. [Protection of plant and personnel in factories, power stations, etc; Lighting standards for vital factories; Pilot l