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  1. The Expression of the Emotions in Man and Animals.Charles Darwin - 1898 - Mineola, New York: Courier Dover Publications.
    Highly readable 1872 study by the great naturalist examines how people and animals display fear, anger, and pleasure. Abounding in anecdotes and quotations, it continues to inspire contemporary research. 21 figures, 7 plates.
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  • Civilization and its discontents.Sigmund Freud - 1966 - In John Martin Rich (ed.), Readings in the philosophy of education. Belmont, Calif.,: Wadsworth Pub. Co..
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