Better version than one already existed on WikiCommons, since he is en face here and was looking right (away from the text on most of uses) on older photo.
George M. Bergman has released all of his photographs on the Oberwolfach Photo Collection under the license below.
Please be aware that any photograph credited to George M. Bergman that is dated before 1968 may be misattributed and should not be uploaded to Commons with this license.
For high resolution scans uploaded by George Bergman or George Ho, use {{George Bergman cc-by-sa-4.0 and GFDL-unspecified}} instead.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 only as published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.