Bongark, Heinz Luftmacht Deutschland Luftwaffe-Industrie-Luftfahrt, 1939, illustrated dustwrapper, gothic text, photographs, contemporary advertisements; Deutsche Luftwacht, Ausgabe Luftwehr, Band III (1936), an aviation directory with text, photographs, and diagrams, index; Dipl. Ing. K. Haarman, Das Erkennen von Flugzeugen, a booklet, illustrated cover, gothic text, photographs, drawings and profiles; Zeitschrift des Vereines Deutscher Ingenieure, five papers, one dated 13 January 1894 concerned with engineering matters including railway locomotives and early flying machines and one dated 28 March 1896, similar and including early aerofoil theory plus three others similar; a bound scrap-book containing numerous press cuttings of aviation interest and a Luftwaffe aircraft recognition book (10)