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VOLKOGONOV D. Stalin: Triumph and Tragedy. Trans. Shukman H. London: Weidenfeld & Nicolson, 1991. Pp. 502–524.
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MURPHY D. E., KONDRASHEV S. A., BAILEY G. Battleground Berlin: CIA vs. KGB in the Cold War. New Haven, Conn.: Yale University Press, 1997. P. ix.
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Report on the Covert Activities of the Central Intelligence Agency. Special Study Group, Doolittle J. H., chairman. Washington, D.C., 1954. Sept. 30. P. 7.
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HELMS R. (with Hood W). A Look over My Shoulder: A Life in the Central Intelligence Agency. New York: Random House, 2003. P. 124.
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EVAN TH. The Very Best Men: The Daring Early Years of the CIA. New York: Simon & Schuster, 1995. Pp. 25, 30, 36, 142–152. Также: U. S. Senate. Final Report. pt. 6. History of the Central Intelligence Agency; IMMERMAN R. A Brief History of the CIA // In: Theoharis A. et al., eds. The Central Intelligence Agency: Security Under Scrutiny. Westport, Conn.: Greenwood Press, 2006. P. 21.