National Museum of Nuclear Science & History
Groht worked for Stone and Webster Engineering Corporation.
Cloyd Marvin had been drafted into the Army, interrupting his education at Haverford University, in 1943 and joined the Special Engineer Detachment as a technician third grade, later being assigned to Los Alamos National Labs in 1947.
Charles Mather worked for the Tennessee Eastman Corporation at the Y-12 Plant.
