Author Topic: Contemporary Air Navigation  (Read 176 times)

Offline Berman

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Contemporary Air Navigation
« on: June 02, 2021, 09:53:08 PM »
 Click on Google translate if necessary. https://www.gutenberg.org/files/42489/42489-h/42489-h.htm
  Kites, balloons, and flying machines.
« Last Edit: June 03, 2021, 02:10:34 AM by Berman »