William R. Cain

Philip Grant Koontz

Philip G. Koontz was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

L. M. Nunley

W. H. Longtin

W. H. Longtin worked for the United States Engineer District Office.

R. M. Ayers

R. M. Ayers worked for the Roane-Anderson Company.