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http://www.bbc.co.uk
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3. Benn, Tony (1988) Out of the Wilderness: Diaries, 1963–67, London: Arrow Books.
4. Butler, David and Butler, Gareth (1994) British Political Facts, 1900–1994, London: Macmillan.
5. Charlot, Monica (1998) The Wilson Years, Paris: Didier-Erudition.