Rudolph took the picture which was provided to Wikimedia Commons by the German Federal Archive (Deutsches Bundesarchiv) as part of a cooperation project. Charles01 (cropped this version)
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: I have cropped a picture of Arno Mohr with Otto Nagel in order to show just Arno Mohr. The idea is to provide an image that is more suitable for use in a wikipedia entry on Arno Mohr, having particular regard to wikipedia readers with small screens or (which is worse) those who believe their Handy pocket telephones are computers in disguise. The original can be viewed here: Bundesarchiv Bild 183-S97999, VBK-Gründung, Arno Mohr, Otto Nagel.jpg: . Modifications made by Charles01.
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