National Museum of Nuclear Science & History
R. G. Humphries worked for the United States Engineer District Office.
H.A. Fettinger was a junior physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Mollie Sprio was a stenographer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
McCall worked in the 100 F Area at Hanford during the Manhattan Project.
