National Museum of Nuclear Science & History
M. N. Andrews worked for the J.A. Jones Construction Company.
Tommie Richardson was a staff worker at Los Alamos during the Manhattan Project.
W. H. Williams worked for the Union Carbide & Carbon Corporation.
Arthur L. Hughes was an British/Welsh physicist. He worked on the Manhattan Project in St. Louis on the cyclotron and plutonium production and at Los Alamos, NM.