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Extracts from George H. GALLUP. The Gallup International Public Opinion Polls : Great Britain 1937-1975. vol 2, 1965-1975. New York : Random House, 1976
Extracts from George H. GALLUP. The Gallup International Public Opinion Polls : GreatBritain 1937-1975. vol 2, 1965-1975. New York : Random House, 1976
