Belgische Landesverteidigung und Bürgerwacht (garde civique) 1914 / in amtlichem Auftrage bearb. von Bernhard Schwertfeger book of the gun / Harold L. Peterson war department technical manual 75-MM gun matériel, M1897 and modifications / prepared under direction of the chief of ordnance war department technical manual Browning machine gun caliber 50, M2 aircraft : fixed and flexible war department technical manual Direct-fire telescope for 3-inch and 90-mm antiaircraft guns : ordnance maintenance explosivstoffe mit besonderer berücksichtigung der neueren patente Nitrosprengstoffe / Ri. Escales geïllustreerde albums Helicopters in oorlogstijd / Bill Gunston en John Batchelor ; red. Christy Campbell the illustrated international aircraft guide Airliners of the 1930s / John Stroud ; consultant ed.: Bill Gunston the illustrated international aircraft guide Early airliners / Chris Chant ; consultant ed.: Bill Gunston the illustrated international aircraft guide General aviation / Michael F. Jerram and Cliff Barnett ; consultant ed.: Bill Gunston the illustrated international aircraft guide Piston airliners since 1940 / Dennis Baldry ; consultant ed.: Bill Gunston the illustrated international aircraft guide Fighters of World War II part 1 / Bernard Fitzsimons ; consultant Bill Gunston