National Museum of Nuclear Science & History
L. A. Castellanos worked for the J.A. Jones Construction Company.
Edna K. Marks was a junior biologist and technician in the Health Division at the University of Chicago Met Lab.
Hirst worked at the 100-D Area at Hanford during the Manhattan Project.
Fredrika Lewis was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
