Book call no. 940.544943 R595 Great Britain. Prepared for the War Office and the Air Ministry by the Ministry of Information. London, HMSO, 1943. The Great London Barrage, pp 48-54.
Book call no.
Britain in Three World Wars, 1793-1945 . London, Hambledon Press, 1992. The Battle of Britain and the Air Ministry pp 649-660. Book call no.