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1
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2Published 1955.“…Proceedings of the American Philosophical Society. Vol. 99, 1.…”
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3Published 1959“…Reprint: Proceedings of the American Philosophical Society, 103(1959):no.4.…”
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4Published 1954.“…Memoirs of the American philosophical society, held at Philadelphia for promoting useful knowledge, vol. 36.…”
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5
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6Published 1964“…Reprintfrom the Proceedings of the American Philosophical Society, vol. 108,5.…”
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