This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Berlinermarker. own original caption Personal photograph taken by me br from org en to Commons by User Logan using de php CommonsHelper Astrochemist at org en No rights claimed Astrochemist Original upload log page en Berlinermarker Astrochemist bytes Personal photograph taken by me No rights claimed Emile Berliner