![](http://www.alamy.com/thumbs/6/84F2BBEA-8C67-48C0-A691-BDB25D9FA974/KF35AK.jpg)
Paul Ehrenfest and Pascual Jordan 1920s
Size: 1881px × 1328px
Photo credit: © Historic Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ancient, book, bygone, copy, cover, editorial, historic, history, illustration, news, nostalgia, nostalgic, photo, photograph, photography, space, stock, textbook, vintage