National Museum of Nuclear Science & History
M. O. Swanson worked for the United States Engineer District Office.
Howard “Howie” Wilcox was an American physicist. He studied at the University of Minnesota and was a teaching fellow at Harvard when he was recruited to work on the Manhattan Project at Los Alamos.
Phelps worked in the 100 F Area at Hanford during the Manhattan Project.
Thomas Jenkins worked for the Tennessee Eastman Corporation at the Y-12 Plant.