Floyd J. Ritchie

W. E. Kirby

Grace R. Harvey

Grace R. Harvey was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. G. Mansfield

R. G. Mansfield worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Edward C. Creutz

Edward C. Creutz (1913-2009) was an American physicist who worked on the Manhattan Project at Los Alamos and at the University of Chicago Metallurgical Laboratory.