National Museum of Nuclear Science & History
E. Lander worked for the Roane-Anderson Company.
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
E. G. Olsen worked for the United States Engineer District Office.
Brown worked for Stone and Webster Engineering Corporation.
Eleanor Caldwell was a laboratory technician in the Health Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
