Search Results       Your search for [subject]Air raids warning system returned 1 record.           Instructions on air raids and blackouts, issued by the Office of Publicity and Propaganda, Civilian Emergency Administration, Commonwealth of the Philippines. Manila: Bur. of Print, 1941. Subject: Air defenses; Air raids warning system; Air raids -- Protective measures; Civilian defense; Blackouts in war; Aeronautics -- Safety measures.          Add to Book Cart   |    Digital Copy Available Relevance: 33.50%