File:Richard Arnold Dümmer00.jpg

Summary
Non-free fair use rationale:


 * 1) The image is of low resolution
 * 2) Use of this low-grade image cannot pose a commercial threat to the copyright holder
 * 3) The subject died in 1922 so that it is not possible to obtain a free image
 * 4) The article will be greatly improved by the addition of this image