Tolong jelaskan mengenai Sumber Utama dari Yuri Andropov

Johanna Granville, trans., "Soviet Archival Documents on the Hungarian Revolution, 24 October – 4 November 1956" ,

Cold War International History Project Bulletin, no. 5 (Woodrow Wilson Center for International Scholars, Washington, D.C.), Spring 1995, pp. 22–23, 29–34.