National Museum of Nuclear Science & History
L. L. Kelly worked for the United States Engineer District Office.
H. A. Pritchard worked for the J.A. Jones Construction Company.
P. J. Stewart worked for the Fercleve Corporation.
Trumper worked for Stone and Webster Engineering Corporation.
Stanislaw Ulam (1909-1984) was a Polish-American mathematician. Ulam was born in 1909 in Lvov, Austria-Hungary (present-day Ukraine).