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3Conference Proceeding BookPublished 1964Other Authors: “…Freudenthal, Alfred Martin…”
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4Conference Proceeding BookPublished 1956Other Authors: “…Freudenthal, Alfred Martin…”
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5Conference Proceeding BookPublished 1975Other Authors: “…Freudenthal, Alfred Martin, 1906-…”
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6Conference Proceeding BookPublished 1972Other Authors: “…Freudenthal, Alfred Martin, 1906-…”