. . "Enhedsmærker." . . . . . . . . . . "Official guide to the Army Air Forces" . . . . . . "AAF : the official guide to the Army Air Forces : a directory, almanac and chronicle of achievement" . . "Uddannelse." . . "2. verdenskrig." . . "USA." . . "Gradsbetegnelser." . . "Taktik." . . "Army Air Forces Aid Society." . . "Luftoperationer." . . "Organisation." . .