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Valuable lessons. Lilienthal ....
There is no mystery about flight.
Was Lilienthal uns lehrte:
Das Fliegen hat sein Geheimnis verloren!
ca. 1895
Valuable lessons. Lilienthal ....
There is no mystery about flight.
Was Lilienthal uns lehrte:
Das Fliegen hat sein Geheimnis verloren!
ca. 1895