The mastery of the air

Langley Memoir on Mechanical Flight, Parts I and II Smithsonian Contributions to Knowledge, Volume 27 Number 3, Publication 1948, 1911

Heroic airmen and their exploits

Aeolus; or, the future of the flying machine

Omhoog in het luchtruim! Praatje over het luchtvaartvraagstuk De Aarde en haar Volken, 1908

The Aeroplane Speaks

Die Luftschiffahrt der Gegenwart

Lecture on Artificial Flight Given by request at the Academy of Natural Sciences

Learning to Fly: A Practical Manual for Beginners

The Early History of the Airplane

Aircraft

Aviation in Canada, 1917-1918 Being a Brief Account of the Work of the Royal Air Force Canada, the Aviation Department of the Imperial Munitions Board, and the Canadian Aeroplanes Limited