National Museum of Nuclear Science & History
E. A. Kehtel worked for the J.A. Jones Construction Company.
J. V. Hubbard worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Elvin Krieble worked for the United States Engineer District Office.
