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Balafi, Michael. The Zeppelin. (Barnsley: Pen & Sword Books, 2015), 1 - 10.
Syon, Guillaume D.. Zeppelins! Germany and the Airship, 1900 - 1939. (Baltimore: Johns Hopkins University Press, 2002), 15.
Syon. Zeppelin!, 18.
Morrow jr. John H. The Great War in the Air: Military Aviation from 1909 to 1921. (Tuscaloosa: University of Alabama Press, 1993), 3.”The First Zeppelins: LZ-1 through LZ-4.” airships.net. (Accessed January 26, 2020) https://www.airships.net/zeppelins/
Zeppelin, Ferdinand Graf. Navigable Balloon. U.S. Patent 621,195 filed December 29, 1897, and issued March 14, 1899. (Accessed January 26, 2020) https://patentimages.storage.googleapis.com/c5/2c/4c/f051d05c05807c/US621195.pdf.
“The First Zeppelins: LZ-1 through LZ-4.”https://www.airships.net/zeppelins/
Syon. Zeppelin!, 23 - 31. “The First Zeppelins: LZ-1 through LZ-4.”
Syon, Guillaume D.. Zeppelins! Germany and the Airship, 1900 - 1939. (Baltimore: Johns Hopkins University Press, 2002), 15.
Syon. Zeppelin!, 18.
Morrow jr. John H. The Great War in the Air: Military Aviation from 1909 to 1921. (Tuscaloosa: University of Alabama Press, 1993), 3.”The First Zeppelins: LZ-1 through LZ-4.” airships.net. (Accessed January 26, 2020) https://www.airships.net/zeppelins/
Zeppelin, Ferdinand Graf. Navigable Balloon. U.S. Patent 621,195 filed December 29, 1897, and issued March 14, 1899. (Accessed January 26, 2020) https://patentimages.storage.googleapis.com/c5/2c/4c/f051d05c05807c/US621195.pdf.
“The First Zeppelins: LZ-1 through LZ-4.”https://www.airships.net/zeppelins/
Syon. Zeppelin!, 23 - 31. “The First Zeppelins: LZ-1 through LZ-4.”