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2. Butterfield, Herbert. Christianity and History, 13. Fontana, London: Collins, 1957.
3. Dawson, Christopher. The Historic Reality of Christian Culture, 36. New York: Harper, 1960.
4. Fénelon, François. Lives of the Ancient Philosophers. New York, 1900.
5. Frank, Robert H. Luxury Fever. New York: Free Press, 1999.