Walter Daniel
Bonner

Queens University


Manne
Siegbahn

Royal Swedish Academy of Sciences (Physics Tree)


Peter
Pringsheim

Universität Berlin (Physics Tree)




Harold S.
Johnston

UC Berkeley












Arnold Johannes Wilhelm
Sommerfeld

Universität München (Physics Tree)


Niels
Bohr

Copenhagen University (Physics Tree)


Erwin
Schrödinger

Universität Wien (Physics Tree)







Robert Jay
Gordon

University of Illinois, Chicago
(Options)

Robert GordonX