home security circular Provision of air raid shelter in specified areas / Home Office, Air raid precautions department circular Air raid precautions act, 1937 : first aid posts and ambulance services / Ministry of Health air publiction Flying training manual : Applied flying / Air Ministry circular / a.r.p. department Civilian duty respirators fitted with microphone attachments / Home Office, Air raid precautions department detection and identification of war gases : notes for the use of gas identification officers / Ministry of Home Security, Air raid precautions department Prime cost contracts for emergency work / Ministry of Home Security, Air raid precautions department Air raid precautions training manual / Ministry of Home Security. Air raid precautions department : Manual for officers responsible for A.R.P. training R.A.F. Middle East : the official story of air operations in the Middle East, from February 1942 to January 1943 / [by the Ministry of … home security circular Charges for respirators lost or damaged by members of the public / Home Office, Air raid precautions department Notes on the construction, maintainance and replacement of sandbag revetments / Ministry of Home Security, Air raid precautions department air publiction Flying training manual : Flying instruction / Air Ministry air publiction Flying training manual : Seaplane flying / Air Ministry