National Museum of Nuclear Science & History
H. W. Oldfield worked for the Roane-Anderson Company.
Howard Parsons was an American physicist. Parsons was born in Chicago in 1920. He receieved a B.S. from the University of Chicago, and shortly afterwards was hired to work on the Manhattan Project as a research assistant at the Chicago Met Lab.
Martin was a staff member at Los Alamos during the Manhattan Project.
Dodson Marrs worked in carpentry and concrete work at Oak Ridge, Tennessee as a part of the Manhattan Project.