Paul Georg Ehrhardt, Hans Gustav Röhr and Hermann Göring

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For a historical research I am looking for any information available about the WWI flyers Paul Georg Ehrhardt and Hans Gustav Röhr, who apparantly were in the same squadron as Hermann Göring.

After WWI Ehrhardt worked as a writer and engineer (including at the Zeppelin factory around 1920), while Röhr set up his own automobile company in the 1920s. I am especially interested in the relation between Ehrhardt and Röhr with the German engineer Dipl.-Ing. Josef Ganz and the life and work of Ehrhardt during the Nazi regime.

Any information about Ehrhardt and Röhr is greatly appreciated!

For more information about my research see: ganz-volkswagen [.] org