[en] [Gutenberg 46656] • The Ghost of Mystery Airport Jovian Press
[en] [Gutenberg 41135] • The Theory and Practice of Model Aeroplaning Library of Alexandria
[en] [Gutenberg 38739] • The Wright Brothers' Engines and Their Design Independently Published
[da] [Gutenberg 34062] • Luftseilerens Skat HardPress
[en] [Gutenberg 45825] • The Aeroplane Theclassics.Us
[fr] [Gutenberg 34633] • L'A. B. C. de l'aviation: Biplans et monoplans Forgotten Books
[en] [Gutenberg 42018] • Natural Stability and the Parachute Principle in Aeroplanes Forgotten Books
[en] [Gutenberg 31023] • The First Airplane Diesel Engine: Packard Model DR-980 of 1928 Public Domain Books
[en] [Gutenberg 45344] • Artificial and Natural Flight Osler Press
[en] [Gutenberg 52025] • Motor Matt's Make-and-Break; or, Advancing the Spark of Friendship Createspace Independent Publishing Platform
[en] [Gutenberg 52397] • Motor Matt's Short Circuit; or, The Mahout's Vow Createspace Independent Publishing Platform