Ornithopter by Jacob Degen; Illustration of Jakob Degens 19th century flying machine; no. 1; according to p. 412; Jakob Degen?; 1807; August Wilhelm Zachari? Die Elemente der Luftschwimmkunst. Wittenberg: in der Zimmermannischen Buchhandlung; 1807
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Creative#:
TOP28096443
Source:
達志影像
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RM
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