National Museum of Nuclear Science & History
M. E. Gregson worked for the Roane-Anderson Company.
Howard R. Kratz (1916-2013) was a nuclear physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Loew worked in the 300 Area at Hanford during the Manhattan Project.
Seymour worked at the 200 West Area at Hanford during the Manhattan Project.