File:Carlos von Riefel04.jpg

Fair use rationale:


 * 1 The image is low-resolution and is not viable for commercial reproduction
 * 2 The article is improved by the addition of this image
 * 3 A free image is not available
 * 4 This image is strongly associated with its author, and its absence would lessen the value of the article
 * 5 The copyright holder is unknown