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1 Aeronautical Classes, No. 5. Royal Aeronautical Society’s publications.
2 Aeronautical Classes, No. 5. Royal Aeronautical Society publications.
3 This list it as given by Wilbur Wright himself.
4 Century Magazine, September, 1908.
5 Aeronautical Journal, No. 79.
6 Aeronautical Journal, July, 1908.
7 Smithsonian Publications No. 2329.
8 Fourth Wilbur Wright Memorial Lecture, Aeronautical Journal, Vol. XX, No. 79, page 75.
9 Ibid. page 73.
10 Ibid. pp. 91 and 102.
11 Airships Past and Present.
12 Hildebrandt.
13 Hildebrandt.
14 Hildebrandt. Airships Past and Present.