National Museum of Nuclear Science & History
Ed Helfenberger worked for the Roane-Anderson Company.
Walter Treibel was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Mary New was a staff worker at Los Alamos during the Manhattan Project.
A. H. Yohannan worked for the Roane-Anderson Company.
DePersio worked in the United States Engineer District Office.
