National Museum of Nuclear Science & History
Phelps worked in the 100 F Area at Hanford during the Manhattan Project.
James King worked at the Y-12 Plant in Oak Ridge, Tennessee, in the uranium purification process from February 1944 to February 1947.
Lee Holmes worked for the G.G. Ray Company.
Julius M. Simmons was an American chemist. He worked as a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.