National Museum of Nuclear Science & History
J. E. Mason worked for the Roane-Anderson Company.
Calhoun worked at the 100-B Area at Hanford during the Manhattan Project.
E. M. Rogers worked for the United States Engineer District Office.
Robert C. Hirt was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Wallace Vogwill was a laboratory helper at the Chicago Met Lab during the Manhattan Project.
