National Museum of Nuclear Science & History
Gebhardt worked for Stone and Webster Engineering Corporation.
J. D. McPherson worked for the United States Engineer District Office.
Edward J. Fredrick was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
J. J. Tulley worked for the Fercleve Corporation.
Frank Schultz worked for the Edenfield Electric Company.
