Paul C. Schmidtke

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.

G. F. Haab

P. L. Robertson

P. L. Robertson worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Neil S. Bergen

Neil Bergen was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.