National Museum of Nuclear Science & History
Stewart worked at the 200 West Area at Hanford during the Manhattan Project.
John Manthey worked for the United States Engineer District Office.
Cardea Hubbard was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
J. H. Sterner worked for the Tennessee Eastman Corporation at the Y-12 Plant.