National Museum of Nuclear Science & History
Marian S. Baumann was a laboratory technician at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Kenneth L. Cohn was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
A. L. Johnson worked for the J.A. Johnson Construction Company.
F. A. Lehmann worked for the Tennessee Eastman Corporation at the Y-12 Plant.
