Leland F. Pettengill

G. Z. Barton

G. Z. Barton worked for the Poe Piping & Heating Company.

Margaret M. Emmerson

Margaret M. Emmerson was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Thelma Northrup

Frank J. Schnettler

Frank J. Schnettler was an American metallurgist who studied the properties of plutonium at Los Alamos.