Rosner, Karl F.M. Das Flugzeug fur die Kriegsmarine und den Wassersport. Berlin, C.J.E. Volckmann, 1912. 61pp, illus w/ line drawings and photos, 6.5x9.5", hard cover. Good, sound condition. German text. Theory and practice of boat hull and seaplane float design. Sections w/photos of the famous flying boats of the period.