National Museum of Nuclear Science & History
William S. Biggers worked as a chemical engineer during the Manhattan Project. Biggers worked at the the Houdaille-Hershey Plant in Decatur, Illinois from April 1944 to December 1946.
Graf worked at the 300 Area at Hanford during the Manhattan Project.
Margaret Ramsey Keck (1923-2016) was an American physicist. Soon after she graduated in 1945 from the University of Rochester with a degree in physics, Keck was hired by the Manhattan Project to work at Los Alamos.