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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1 to 4); 2 (, 1 to 4); 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 7); 10 (, 1 to 7); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1 to 8); 14 (, 1 to 10); 15 (, 1 to 12, 15 to 17); 16 (, 1 to 12); 17 (, 1 to 12); 18 (, 1 to 12); 19 (, 1 to 12); 20 (, 1 to 12); 21 (, 1 to 12); 22 (, 1 to 12); 23 (, 1 to 12); 24 (, 1 to 12); 25 (, 1 to 12); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1, 5 to 12); 29 (, 1 to 12); 30 (, 1 to 12); 31 (, 1 to 12); 32 (, 1 to 12); 33 (, 1 to 12); 34 (, 1 to 6); 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Portico
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Preserved
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2026-02-12
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Preserved : 1992/1993: 1(1-4), 1993: 2(1-4), 1994: 3(1-6), 1995: 4(1-6), 1996: 5(1-6), 1997: 6(5), 1998: 7(3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 35
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Portico
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Preserved
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2026-02-12
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Preserved : 2001: 10(2-6), 2002: 11(1-4), 2003: 12(4-5)
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Portico
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Preserved
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2026-02-12
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Preserved : 2004: 13(8), 2005: 14(10), 2006: 15(1-2, S 2, 3-7, 9-10, 12), 2007: 16(1-5, 7-12), 2008: 17(1-12), 2009: 18(1-12), 2010: 19(1-12), 2011: 20(1-12), 2012: 21(1-6, 8-9, 12), 2013: 22(1-7, 9-12), 2014: 23(1-12), 2015: 24(2-12), 2016: 25(1-12), 2017: 26(1, S 1, 2, S 2, 3-12), 2018: 27(1-3, S 3, 4-12), 2019: 28(1-12), 2019/2020: 29(1, S 1, 2, S 2, 3-12), 2021: 30(1-12), 2022: 31(1-12), 2023: 32(1-12), 2024: 33(1-5, 7-12), 2025: 34(1-12), 2026: 35(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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21, 28
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LOCKSS Archive
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Preserved
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2026-02-09
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22 to 27
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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 6); 2 (1 to 9, 11, 12); 3 (1 to 9, 11, 12); 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 8); 14 (1 to 9); 15 (1 to 9, 11, 12); 16 (1 to 9, 11, 12); 17 (1 to 9, 11, 12); 18 (1 to 9, 11, 12); 19 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11, 12); 27 (Suppl 1, 1 to 9, 11, 12); 28 (Suppl 1, 1 to 9, 11, 12); 29 (Suppl 1, 1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1 to 9, 11, 12); 33 (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 (1 to 6); 2 (1 to 9, 11, 12); 3 (1 to 9, 11, 12); 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 8); 14 (1 to 9); 15 (1 to 9, 11, 12); 16 (1 to 9, 11, 12); 17 (1 to 9, 11, 12); 18 (1 to 9, 11, 12); 19 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11, 12); 27 (Suppl 1, 1 to 9, 11, 12); 28 (Suppl 1, 1 to 9, 11, 12); 29 (Suppl 1, 1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1 to 9, 11, 12); 33 (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 : 7 (1-6); 8 (1-6); 9 (1-6); 10 (S2, 1-6); 11 (supplement-1, 1-6); 12 (1-6); 13 (01, 2-8); 14 (1-10); 15 (01, 2-12, 15, 16); 16 (supplement-3, 1-3, 5-12); 17 (1-12); 18 (supplement-2, 1-12); 19 (supplement-1, 1-12); 20 (supplement-2, 1-12); 21 (supplement-5, 1-12); 22 (supplement-1, 1-8, 10-12); 23 (supplement-2, 1-12); 24 (supplement-2, 1-12); 25 (supplement-1, 1-12); 26 (supplement-1, 1-12); 27 (supplement-1, 1-12); 28 (supplement-2, 1-11); 33 (3)
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