Leighton B. Ewell

H. R. Kroegar

H. R. Kroegar worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Robert A. Muller

Robert Muller worked for the United States Engineer District Office.

E. W. Thomas

Helen Williams

Helen Williams was a stenographer and clerk at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.