National Museum of Nuclear Science & History
H. H. Maples worked for the Roane-Anderson Company.
Delbert Ball was a procurement officer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
E. D. Shipley worked for the Tennessee Eastman Corporation at the Y-12 Plant.
