National Museum of Nuclear Science & History
John Ruhoff worked for the United States Engineer District Office.
Charles White worked for the United States Engineer District Office.
Olga (Giacchetti) Fineman was a technical assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory during the Manhattan Project.
Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
