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Justus G. Kirchner
James Bonner explaining an exhibit
Norman Horowitz
Paul Ehrenfest and Calvin Bridges
Henry Hellmas in plant lab
Cornelis Wiersma with unidentified woman in lab
James Liverman and James Bonner
Ernest G. Anderson inspecting corn
Henry Lester in the lab
Henry Borsook
Cornelis Wiersma
Ezra S. Gosney
Frits Went and James Bonner in the plant lab
Robert Sinsheimer
Robert Sinsheimer
Interior of the Earhart Plant Physiological Lab
Theo Dobzhansky
R. W. Hummer
Robert Sinsheimer
James Bonner