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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 to 4); 3 (1 to 4); 4 (1 to 6); 5 (1 to 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1, 2, 4 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1 to 12); 30 (1 to 12); 31 (1 to 12); 32 (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 : 1 (1, 2, 4 to 6); 3 (1 to 4); 4 (1, 2, 4 to 6); 5 (1 to 3, 5, 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1, 2)
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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 : 1 (1, 2, 4 to 6); 3 (1 to 4); 4 (1, 2, 4 to 6); 5 (1 to 3, 5, 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1, 2)
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CLOCKSS Archive
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Preserved
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2026-05-18
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1 to 32
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Portico
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Preserved
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2026-05-14
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Preserved : 1995: 1(1-2), 1996: 2(1-4), 1997: 3(1-4), 1998: 4(1-6), 1999: 5(1-6), 2000: 6(1-6), 2001: 7(1-6), 2002: 8(1-6), 2003: 9(1-6), 2004: 10(1-2, 4-6), 2005: 11(1-6), 2006: 12(1-6), 2007: 13(1-6), 2008: 14(1-6), 2009: 15(1-6), 2010: 16(1-6), 2011: 17(1-6), 2012: 18(1-6), 2013: 19(1-5), 2014: 20(1-6), 2015: 21(1-6), 2016: 22(1-6), 2017: 23(1-6), 2018: 24(1-6), 2019: 25(1-6), 2019/2020: 26(1-12), 2021: 27(1-12), 2022: 28(1-12), 2023: 29(1-12), 2024: 30(1-12), 2025: 31(1-2, 5-12), 2026: 32(1-5)
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LOCKSS Archive
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In Progress
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2026-05-18
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18, 25
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LOCKSS Archive
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Preserved
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2026-05-18
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19 to 24
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Library of Congress
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Preserved
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2025-04-07
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24 (2 to 6); 25 (1 to 6); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1 to 12); 30 (1 to 11); 31 (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 : 1 (4); 2 (1 to 6); 3 (1 to 9, 11, 12); 4 (3); 5 (4); 7; 8 (3, 4); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 9, 11, 12); 27 (1 to 9, 11, 12); 28 (1 to 9, 11, 12); 29 (1 to 9, 11, 12)
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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 : 1 (4); 2 (1 to 6); 3 (1 to 9, 11, 12); 4 (3); 5 (4); 7; 8 (3, 4); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 9, 11, 12); 27 (1 to 9, 11, 12); 28 (1 to 9, 11, 12); 29 (1 to 9, 11, 12)
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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 : 3 (1-4); 4 (1, 2, 4-6); 5 (1-3, 5, 6); 6 (1-6); 7 (1-6); 8 (1-6); 9 (1-6); 10 (1, 2, 4-6); 11 (1-6); 12 (1-6); 13 (1-6); 14 (1-6); 15 (1-6); 16 (1-6); 17 (1-6); 18 (1-6); 19 (1-6); 20 (1-6); 21 (1-6); 22 (1-6); 23 (1-6); 24 (1-6); 25 (1-6); 2018 (2)
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