D. A. Dahl

Norma J. Hinton

Norma J. Hinton was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. E. Combs

M. E. Gregson

M. E. Gregson worked for the Roane-Anderson Company.

Grace Hardin

Grace Hardin worked for the J.A. Jones Construction Company.