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Portico
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Preserved
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2026-04-02
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Preserved : 1998: 1(1-4), 1999: 2(1-4), 2000: 3(1-4), 2001: 4(1-4), 2002: 5(1-2), 2003: 6(1-4), 2004: 7(1-4), 2005: 8(1-4), 2006: 9(1-4), 2007: 10(1, S 1, 2-4), 2008: 11(1-4), 2009: 12(1, S 1, 2-4), 2010: 13(1-4), 2011: 14(1-6), 2012: 15(1-6), 2013: 16(1-6), 2014: 17(1, S 1, 2, S 2, 3-8), 2015: 18(1-8), 2016: 19(1-8), 2017: 20(1-8), 2018: 21(1-8), 2019: 22(1-8), 2020: 23(1-8), 2021: 24(1-8), 2022: 25(1-4, 4, S, 5, 5, S, 6, 6, S, 7, 7, S, 8, 8, S), 2023: 26(1-3, 3, S, 4, 4, S, 5, 7-8, 8, S), 2024: 27(1-7, 7, S, 8), 2025: 28(1, 1, S, 2-4, 4, S, 5-7, 7, S, 8), 2026: 29(1, 1, S, 2)
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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 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (s1, 1 to 4); 11 (1 to 4); 12 (Supplement, 1 to 4); 13 (1 to 4); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (Supplement, 1 to 8); 18 (1 to 8); 19 (1 to 8); 20 (1 to 8); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 8); 26 (1 to 8); 27 (1 to 8); 28 (1 to 8); 29 (1, 2); 42
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CLOCKSS Archive
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Preserved
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2026-04-06
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11 to 17, 19 to 29
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Portico
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Preserved
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2026-04-02
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Preserved : 2001: 4(1-4), 2002: 5(1-4), 2003: 6(1-4), 2004: 7(1-4), 2005: 8(1-4), 2006: 9(1-4), 2007: 10(1-4), 2008: 11(1-4), 2009: 12(1-4), 2010: 13(1-4), 2011: 14(1-6), 2012: 15(1-6), 2013: 16(1-6), 2014: 17(1, S1, 2, S2, 3-8), 2015: 18(1-8), 2016: 19(1-8), 2017: 20(1-8), 2018: 21(1-8), 2019: 22(1-8), 2020: 23(1-8), 2021: 24(1-8)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 24
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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 : 9 (1-4); 10 (s1, 1-4)
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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 4); 2 (1 to 8); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 11 (1 to 4); 12 (, 1 to 4); 13 (1 to 4); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (, 1 to 7); 18 (1 to 8); 19 (1 to 8); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (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 4); 2 (1 to 8); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 11 (1 to 4); 12 (, 1 to 4); 13 (1 to 4); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (, 1 to 7); 18 (1 to 8); 19 (1 to 8); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8)
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