Virtual Reading Room
University of New Mexico, Center for Southwest Research, Ferenc Szasz Papers, box 8, folder 48
Truman Presidential Library, President's Secretary's Files, Box 117
RG 59, Records of the Special Assistant to the Secretary of State for Atomic Energy, General Records Relating to Atomic Energy Matters, 1948-1962, box 83, 21.91 Country File USSR c. Estimates of the Russian Bomb 1947-1952
CREST (CIA Records Search Tool) database
Volume XI 1948 July; James V. Forrestal Papers; box 151; Public Policy Papers, Department of Rare Books and Special Collections, Princeton University Library; also available in Walter Millis, ed., The Forrestal Diaries (New York, Viking Press, 1951), 260-261
Public Policy Papers, Department of Rare Books and Special Collections, Princeton University Library, David Lilienthal Papers, box 197, also available in David E. Lilienthal, The Journals of David Lilienthal Volume II The Atomic Energy Years 1945-1950 (New York: Harper & Row, 1964), 388-392
Public Policy Papers, Department of Rare Books and Special Collections, Princeton University Library, David Lilienthal Papers, box 197
Harry S. Truman Library, Presidents Secretary's File, box 249, Central Intelligence-Memoranda 1945-1948 (copy courtesy of Jeffrey Richelson)
National Archives, Record Group 59 (hereinafter RG 59), Records of the Special Assistant to the Secretary of State for Atomic Energy, General Records Relating to Atomic Energy Matters, 1948-1962, box 83, 21.91 Country File USSR c. Estimates of the Russian Bomb 1947-1952
National Archives, Record Group 219, Records of U.S. Army Staff, Plans and Operations Top Secret Decimal Files, 1946-1948, box 35, 092 TS (Section IX) (Cases 136-150)
National Archives and Records Administration, Record Group 59. Department of State Records, Policy Planning Council Records, 1948-1962, box 28, Political and Psychological Warfare