National Museum of Nuclear Science & History
Matthei worked for Stone and Webster Engineering Corporation.
Iral B. Johns (1902-1987) was an American chemist. An associate professor of chemistry at Iowa State University, Iral B.
Jake Lewis worked for the U.S. Vanadium Company.
Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
