1. Christopher Andrew, Secret Service, The Making of the British Intelligence Community, London, Heineman, 1985, Ch. 2
2. John Ranelagh, The Rise and Decline of the CIA, London, Weidenfeld and Nicholson, 1987.
3. Gregg Herken, The Winning Weapon, New York, Knopf, 1980
4. Robert Bothwell and T. L. Granatstein (eds), The Gouzenko transcripts: the evidence presented to the Kellock Tascherean Royal Commission 1946, Ottawa, Denean, 1982.
5. For American attitudes towards loyalty and security see: David Caute, The Great Fear: The Anti-Communist Purge under Truman and Eisenhower, [plLondon, Secker and Warburg}, 1978