National Museum of Nuclear Science & History
Elvin Krieble worked for the United States Engineer District Office.
John H. Martens was a research associate and chemist at the University of Chicago Met Lab and a member of the Special Engineer Detachment at Oak Ridge.
W. K. Black worked for the Roane-Anderson Company.
H. M. Metcalf worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Clyde R. Emery worked in the shop at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
