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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 5
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Portico
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Preserved
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2026-04-02
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Preserved : 2014: 1(1-2), 2015: 2(1), 2016: 3(1), 2017: 4(1), 2018: 5(1, sup1), 2019: 6(1)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1, 2); 2 (1); 3; 5; 6
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Library of Congress
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Preserved
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2025-04-07
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4 (1); 5 (sup1, 1); 6 (1)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 6
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