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Gregory Bateson (1972). “Steps to an Ecology of Mind: Collected Essays in Anthropology, Psychiatry, Evolution, and Epistemology”, p.336, University of Chicago Press
Gregory Bateson (1972). “Steps to an Ecology of Mind: Collected Essays in Anthropology, Psychiatry, Evolution, and Epistemology”, p.47, University of Chicago Press
Gregory Bateson (1972). “Steps to an Ecology of Mind: Collected Essays in Anthropology, Psychiatry, Evolution, and Epistemology”, p.143, University of Chicago Press
Gregory Bateson (1972). “Steps to an Ecology of Mind: Collected Essays in Anthropology, Psychiatry, Evolution, and Epistemology”, p.493, University of Chicago Press