National Museum of Nuclear Science & History
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Frances I. Armstead was a staff member at Los Alamos during the Manhattan Project.
M. Carey worked for the Roane-Anderson Company.
C. W. Cantrell, Jr. worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Buettner worked in the United States Engineer District.