J. L. Swanson

J. O. O’Hare

Martha G. Johnson

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

J. N. Harwood

J. N. Harwood worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Joseph Levinger

Joseph Levinger was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.