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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 to 4); 2 (1 to 6); 3 (1 to 6); 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, 3-4, 5, 6); 11 (1 to 6); 12 (1 to 4, 5-6); 13 (1 to 6); 14 (1, 2, 3-4, 5, 6); 15 (1 to 6); 16 (1 to 3, 4-5, 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 20 (Suppl, 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 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 30 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (1 to 8); 34 (1 to 8); 35 (1 to 8); 36 (1 to 8); 37 (1 to 3)
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Portico
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Preserved
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2026-04-02
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Preserved : 1990: 1(1-4), 1991: 2(1-6), 1992: 3(1-6), 1993: 4(1-6), 1994: 5(1-6), 1995: 6(1-6), 1996: 7(1-6)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 37
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Portico
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Preserved
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2026-04-02
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Preserved : 2006: 17(1)
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Portico
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Preserved
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2026-04-02
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Preserved : 2008: 19(5-6), 2009: 20(1, S 1, 2-4, 6), 2010: 21(1-6), 2011: 22(1-6), 2012: 23(2-3, 6), 2013: 24(1-6), 2014: 25(1-6), 2015: 26(2-6), 2016: 27(1-6), 2017: 28(1-6, 8), 2016/2018: 29(1-8), 2017/2019: 30(1-8), 2018/2019/2020: 31(1-8), 2021: 32(1-8), 2022: 33(1-8), 2023: 34(2-8), 2024: 35(1-7), 2025: 36(1-8), 2026: 37(1-3)
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LOCKSS Archive
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In Progress
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2026-04-06
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23, 30
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LOCKSS Archive
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Preserved
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2026-04-06
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24 to 29
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Library of Congress
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Preserved
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2025-04-07
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28 (8); 29 (1 to 8); 30 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (1 to 8); 34 (1 to 8); 35 (1 to 7); 36 (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 (1 to 3, 5, 6); 2 (Suppl 1, 1 to 6); 3 (1 to 8); 8 (1 to 6); 9 (1 to 6); 11 (1 to 6); 12 (1 to 5); 13 (1 to 6); 14 (1 to 3, 5, 6); 15 (1 to 6); 16 (1 to 4, 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 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (1 to 8); 34 (1 to 8); 35 (1 to 8)
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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 to 3, 5, 6); 2 (Suppl 1, 1 to 6); 3 (1 to 8); 8 (1 to 6); 9 (1 to 6); 11 (1 to 6); 12 (1 to 5); 13 (1 to 6); 14 (1 to 3, 5, 6); 15 (1 to 6); 16 (1 to 4, 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 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (1 to 8); 34 (1 to 8); 35 (1 to 8)
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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 : 8 (1-6); 9 (1-6); 10 (1-3, 5, 6); 11 (1-6); 12 (1-5); 13 (1-6); 14 (1-3, 5, 6); 15 (1-6); 16 (1-3, 4-5, 6); 17 (1-4, 6); 18 (1-6); 19 (1-6); 20 (1-4, 6); 21 (1-6); 22 (1-6); 23 (1-6); 24 (1-6); 25 (1-6); 26 (1-6); 27 (1-6); 28 (1-8); 29 (1-8); 30 (1, 2, 4-7)
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