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Library of Congress
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Preserved
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2025-04-07
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13 (1 to 4); 14 (1 to 4); 15 (1 to 3-4); 16 (1 to 4); 17 (1 to 4); 18 (1, 2-3, 4); 19 (1 to 3)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 18 (1, 2-3, 4); 19 (1 to 4)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 18 (1, 2-3, 4); 19 (1 to 4)
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 7 (2); 8 (1, 2); 9 (1, 2); 10 (1-4); 11 (1, 2, 4); 12 (1-4); 13 (1-4); 14 (2-4)
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LOCKSS Archive
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In Progress
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2026-02-09
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7 to 15
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CLOCKSS Archive
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Preserved
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2026-02-09
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7 to 20
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Portico
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Preserved
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2026-02-12
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Preserved : 2012: 7(1-2), 2013: 8(1-2), 2014: 9(1-2), 2015: 10(1-4), 2015/2016: 11(1-4), 2017: 12(1-4), 2018: 13(1-4), 2019: 14(1-4), 2020: 15(1-4), 2021: 16(1-4), 2022: 17(1-4), 2023: 18(1-4), 2024: 19(1-4), 2025: 20(1-4)
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