[Detail of those assembled for group portrait at Rome Conference on Nuclear Physics, including Paul Ehrenfest, back left with glasses, and Niels Bohr, front with smile.]

Courtesy of UC Berkeley, Bancroft Library

http://www.oac.cdlib.org/ark:/28722/bk0016t4f2f/?order=1

Title:

[Detail of those assembled for group portrait at Rome Conference on Nuclear Physics, including Paul Ehrenfest, back left with glasses, and Niels Bohr, front with smile.]

Date:

1931

Contributing Institution:

UC Berkeley, Bancroft Library