S. E. Linter

Alvin F. Germen

Ed Helfenberger

Ed Helfenberger worked for the Roane-Anderson Company.

T. J. O’Donnell

T. J. O’Donnell was the Shop Chief at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Josephine Minch

Josephine Minch was a research assistant in physics at the University of Chicago Met Lab.