scientific article published in 1959

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scholarly article by Howard Ensign Evans published 1963 in Psyche

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scholarly article by Howard Ensign Evans published 1961 in Psyche

scholarly article by Howard Ensign Evans published 1978 in Psyche

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scholarly article by Howard Ensign Evans published 1965 in Psyche

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scholarly article by Howard Ensign Evans published 1971 in Psyche

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