Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA
Photograph collection - Einstein-- EB Series-barn collection\4-EB PHOTOS with A.E.-4-5 inch (1 of 4-dated)
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Albert Einstein in the Amsterdam laboratory of Pieter Zeeman, who is standing on Einstein's right. The person on Einstein's left is Paul Ehrenfest. The photograph dates to about 1920.