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Library of Congress
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Preserved
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2025-04-07
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12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 3)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (2 to 4); 19 (1 to 4); 20 (1)
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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 : 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 18 (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 : 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 18 (1 to 4)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 12 (1 to 4); 13 (1 to 4); 14 (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 : 12 (1-4); 13 (1-3)
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LOCKSS Archive
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In Progress
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2026-04-13
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12 to 14
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Portico
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Preserved
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2026-04-16
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Preserved : 2018: 12(1-4), 2019: 13(1-4), 2019/2020: 14(1-4), 2021: 15(1-4), 2022: 16(1-4), 2023: 17(1-4), 2024: 18(1-3), 2025: 19(1-4), 2025/2026: 20(1-2)
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CLOCKSS Archive
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Preserved
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2026-04-13
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12 to 20
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