This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Assmann Berson. Richard Assmann and Arthur Berson Richard Amann und Arthur Berson Hildebrandt Die Luftschiffahrt nach ihrer geschichtlichen und gegenwrtigen Entwicklung Author PDold Meteorologists from Germany Arthur Berson
Page 2023 Free-images.com. All images are Public Domain