Joseph G. Sullivan

Hennie J. Schallis

Hennie Schallis was a staff worker at Los Alamos during the Manhattan Project.

Herbert August Potratz

Herbert Potratz was an American chemist. Potratz was born in 1902 in Iowa. He received a B.S., an M.S.

Helen Williams

Helen Williams was a stenographer and clerk at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.

Howard B. Austin