William C. Drainer

L. E. Dall

R. J. McLeod

R. J. McLeod worked for the United States Engineer District Office.

T. Frydell

T. Frydell worked for the Roane-Anderson Company.

Edward F. Kolley

Edward F. Kolley was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.