British HomeGuard, 1940-1944. UnitedKingdom: Cranfield University. 2010: 212. Clarke, D. M. Arming the British HomeGuard, 1940-1944. UnitedKingdom: Cranfield
Watching the Skies: The History of Ground Radar in the Air Defence of the UnitedKingdom. Her Majesty's Stationery Office. 1993. ISBN 978-0117727236. The Battle