National Museum of Nuclear Science & History
Harper Welton was a staff worker at Los Alamos during the Manhattan Project.
Waldo E. Cohn was an American biochemist who worked in health physics and isotope separation during the Manhattan Project.
Fredrika Lewis was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Dorothy Maszk worked for the United States Engineer District Office.
