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Sources:
Harry C. Redner: "Die Luftschiffwaffe des Heeres" (book and CD), to order via his homepage.
Paul Schmalenbach: "Die deutschen Marine-Luftschiffe" (ISBN 3-7822-01302).
Neumann: "Die deutschen Luftstreitkräfte im Weltkriege" (ca 1920, also published in English language).
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