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:
Ehrenfest Lorentz Bohr Kamerlingh Onnes. in the Cryogenics Laboratory in Leiden People on the picture from left to right Paul Ehrenfest Hendrik Lorentz Niels Bohr Heike Kamerlingh Onnes luf nl asp hoofdcategorieID paginaID unbekannt PDold Paul Ehrenfest Hendrik Antoon Lorentz Niels Bohr Heike Kamerlingh Onnes People of