Henry J. Pepe

G. E. Knutson

G. E. Knutson worked for the United States Engineer District Office.

John A. Horan

John Horan worked for the United States Engineer District Office.

Mary M. Fair

Mary Fair worked as a lab assistant at the Metallurgical Lab at the University of Chicago. She was not sure of the purpose of her work, but often used radiation detecting devices in the experiments.

W. E. Bridges