National Museum of Nuclear Science & History
Calkins worked at the 200 West Area at Hanford during the Manhattan Project.
Mollie Sprio was a stenographer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Black worked at Los Alamos during the Manhattan Project.
Ruth A. Casler was a lab technician in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
