1. Richard G. Hewlett and Oscar E. Anderson, Jr., A History of the United States Atomic Energy Commission. Vol. I. The New World, 1939/1946 (University Park, Penn.: The Pennsylvania State University Press, 1962), p 173.
2. Ibid., pp. 297, 624.
3. H.D. Smyth, A General Account of the Development of Methods of Using Atomic Energy for Military Purposes Under the Auspices of the United States Government 1940-1945 (Washington, D.C.: U.S. Government Printing Office, 1945), §11.37-11.40, p. 147; reprinted as Henry DeWolf Smyth, Atomic Energy for Military Purposes: The Official Report on the Development of the Atomic Bomb under the Auspices of the United States Government, 1940-1945 (Princeton: Princeton University Press, 1945), §11.37-11.40, pp. 202-203.
4. Vincent C. Jones, United States Army in World War II. Special Studies. Manhattan: The Army and the Atomic Bomb (Washington, D.C.: Center of Military History, United States Army, 1988), Chapter VIII, pp. 172-183.
5. U.S. National Archives and Records Administration, Microfilm A1218, Reel 10, includes Manhattan District History (hereafter MDH), Book VI, “Liquid Thermal Diffusion (S-50) Project.” This consists of a Foreword dated May 21, 1947, a 17-page summary, and a number of sections and appendices describing topics such as the underlying theory, contractor selection, NRL involvement, a description of the plant itself, operations, organization and personnel, maps and charts, photographs, a list of contractors, contract letters, a bibliography, and a glossary.