Videoauge der Berliner Verkehrsbetriebe (BVG), Berlin, 9. November 2007. Foto: Cory Doctorow, Quelle: Flickr https://www.flickr.com/photos/doctorow/1933949337/in/photolist-oCZ81v-CcvqZ-7uky5M-4SdWmN-bHWsqF-7ukwKe-3WTZL6-LhEEL-7uprZJ-934JRw-7ukyDr-7upomA-7ukxBR-7ukxai-7upoUm-7ukwFH-97bSi2-7ukwie-cvuL9f-cvuKnC-cksD8, Lizenz: CC BY_SA 2.0 https://creativecommons.org/licenses/by-sa/2.0/
CC BY_SA 2.0