Der Vogelflug als Grundlage der Fliegekunst Ein Beitrag zur Systematik der Flugtechnik

Aeolus; or, the future of the flying machine

Aircraft

Aircraft and Submarines The Story of the Invention, Development, and Present-Day Uses of War's Newest Weapons

Animal Locomotion; or, walking, swimming, and flying With a dissertation on aëronautics

Artificial and Natural Flight

Aviation in Peace and War

Aërial Navigation A Popular Treatise on the Growth of Air Craft and on Aëronautical Meteorology

Balloons, Airships, and Flying Machines

Birds in Flight

Die Luftschiffahrt der Gegenwart