Informal portrait of Denys Wilkinson
Hedwig Kohn in coffee shop
David Finkelstein
Portraits of Albert Einstein and his sister, Maja, on coffee cups
Frauenfelder Outdoors
Frauenfelder and Unidentified Others
Frauenfelder Converses
Society for Natural Philosophy
Arnold Sommerfeld with Munich professors getting coffee
Informal Portrait of Fredrick
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