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International Federation of Philosophical Societies (1948-) (2)
Max-Planck-Institut für Physik und Astrophysik (1958-1991)(2)
International Council for Philosophy and Humanistic Studies(1)
International Federation of Philosophical Societies (1948-) (2)
Max-Planck-Institut für Physik und Astrophysik (1958-1991)(2)
International Council for Philosophy and Humanistic Studies(1)