Charles M. Gilbert

P. T. Covington

P. T. Covington worked for the Tennessee Eastman Corporation at the Y-12 Plant.

M. F. Welch

M. F. Welch worked for the United States Engineer District Office.

Edgar B. Rynd

George W. Campbell

George W. Campbell was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.