H. O. Brown

Ruth Hoffberg

Ruth Hoffberg was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

J. E. Dooley

J. E. Dooley worked for the Roane-Anderson Company.

L. E. Spring

Desiderio Vigil

Desiderio Vigil was a staff worker at Los Alamos during the Manhattan Project.