National Museum of Nuclear Science & History
Ellen Skirmont was a laboratory technician in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
R. W. Llewellyn worked for the United States Engineer District Office.
Harold Lichtenberger was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
H. L. Ray worked for the Kellex Corporation at the K-25 Plant.