National Museum of Nuclear Science & History
Gertrude Steel was a junior chemist at the Metallurgical Laboratory in Chicago during the Manhattan Project.
P. N. Smith worked for the H. K. Ferguson Company.
John W. Burr was a research assistant in the Metallurgical Laboratory (“Met Lab”) at the University of Chicago during the Manhattan Project.
W. E. S. Trenchard worked for the J.A. Jones Construction Company.