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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, 2-3, 4); 13 (1-2, 3-4); 14 (1, 2-3, 4); 15 (1, 2, 3-4); 16 (1 to 4); 17 (1, 2-3, 4); 18 (1 to 4); 19 (1, 2, 3-4); 20 (1-2, 3, 4); 21 (1, 2, 3-4); 22 (1 to 4); 23 (1, 2, 3-4); 24 (1, 2, 3-4); 25 (1, 2, 3-4); 26 (1-2, 3, 4); 27 (1-2, 3-4); 28 (1-2, 3-4); 29 (1 to 4); 30 (1, 2, 3-4); 31 (1-2, 3-4); 32 (1-2, 3, 4); 33 (1-2, 3, 4); 34 (1-2, 3-4); 35 (1 to 4); 36 (1, 2-4); 37 (1-4); 38 (2 to 4); 39 (1-2, 3, 4); 40 (1 to 4); 41 (1, 2-4); 42 (1 to 4); 43 (1-2, 3, 4); 44 (1-2, 3 to 12); 45 (1 to 12); 46 (1 to 12); 47 (1 to 12); 48 (1 to 10, 11-12); 49 (1 to 12); 50 (8 to 12); 51 (1 to 9, 11, 12); 52 (1 to 12); 53 (1 to 3, 6, 7, 10 to 12); 54 (1 to 3, 4-5, 6 to 10, 11-12); 55 (1-3, 5 to 12); 56 (1, 3 to 12); 57 (1, 2, 3-4)
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Portico
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Preserved
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2026-04-02
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Preserved : 1990: 1(1-3), 1991: 2(1-4), 1992: 3(1-6), 1993: 4(1-4), 1993: 5(1-4), 1994: 6(1-4), 1994: 7(1-4), 1995: 8(1-4), 1995: 9(1-4), 1996: 10(1-4), 1996: 11(1-4), 1997: 12(1), 1997: 13(1-2), 1998: 14(1), 1998: 15(2), 1999: 16(4), 1999: 17(1, 4), 2000: 18(4), 2000: 19(3-4), 2001: 20(4), 2001: 21(3-4), 2002: 22(1-4), 2002/2003: 23(1, 3-4), 2003: 24(3-4), 2003: 25(1)
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CLOCKSS Archive
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Preserved
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2026-03-30
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1 to 57
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Portico
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Preserved
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2026-04-02
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Preserved : 2004: 26(3), 2005: 28(1-2), 2005: 29(1-2), 2006: 30(2)
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Portico
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Preserved
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2026-04-02
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Preserved : 2008: 33(4), 2008: 34(3-4), 2008: 35(1)
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Portico
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Preserved
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2026-04-02
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Preserved : 2011: 40(1-4), 2011: 41(1-4), 2012: 42(3-4), 2012: 43(4), 2013: 44(1-8, 10, 12), 2014: 45(1-2, 4-9, 11-12), 2015: 46(3-12), 2016: 47(1-12), 2017: 48(1-12), 2018: 49(1-12), 2019: 50(1-12), 2019/2020: 51(1-12), 2021: 52(1-12), 2022: 53(1-12), 2023: 54(1-12), 2024: 55(1-11), 2025: 56(1, 4-12), 2025/2026: 57(1-4)
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LOCKSS Archive
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In Progress
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2026-03-30
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42, 43, 50
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LOCKSS Archive
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Preserved
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2026-03-30
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44 to 49
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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 : 2 (1, 3, 4); 3 (1 to 3); 4 (1 to 4); 5 (1-3, 4 to 9, 11, 12); 12 (1, 2, 4); 13 (1, 3); 14 (1, 2, 4); 15 (1 to 3); 16 (1 to 4); 17 (1, 2, 4); 18 (1 to 4); 19 (1 to 3); 21 (1 to 3); 22 (1 to 4); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1, 3, 4); 27 (1, 3); 28 (1, 3); 29 (1 to 4); 31 (1, 3); 32 (1, 3, 4); 33 (1, 3, 4); 34 (1, 3); 35 (1 to 4); 36 (1, 2); 37 (1); 38 (2 to 4); 39 (1, 3, 4); 41 (1, 2); 42 (1 to 4); 43 (1, 3, 4); 44 (1, 3 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11); 49 (1 to 9, 11, 12); 51 (1 to 8, 9-1, 11, 12); 52 (1 to 9, 11, 12); 53 (1, 2, 3-5, 6, 7-9, 11, 12); 54 (1 to 3, 4-5, 6 to 9, 11-12); 55 (1, 4 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 : 2 (1, 3, 4); 3 (1 to 3); 4 (1 to 4); 5 (1-3, 4 to 9, 11, 12); 12 (1, 2, 4); 13 (1, 3); 14 (1, 2, 4); 15 (1 to 3); 16 (1 to 4); 17 (1, 2, 4); 18 (1 to 4); 19 (1 to 3); 21 (1 to 3); 22 (1 to 4); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1, 3, 4); 27 (1, 3); 28 (1, 3); 29 (1 to 4); 31 (1, 3); 32 (1, 3, 4); 33 (1, 3, 4); 34 (1, 3); 35 (1 to 4); 36 (1, 2); 37 (1); 38 (2 to 4); 39 (1, 3, 4); 41 (1, 2); 42 (1 to 4); 43 (1, 3, 4); 44 (1, 3 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11); 49 (1 to 9, 11, 12); 51 (1 to 8, 9-1, 11, 12); 52 (1 to 9, 11, 12); 53 (1, 2, 3-5, 6, 7-9, 11, 12); 54 (1 to 3, 4-5, 6 to 9, 11-12); 55 (1, 4 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 : 12 (1, 2-3, 4); 13 (1-2, 3-4); 14 (1, 2-3, 4); 15 (1, 2, 3-4); 16 (1-4); 17 (1, 2-3, 4); 18 (1-4); 19 (1, 2, 3-4); 20 (1-2, 3, 4); 21 (1, 2, 3-4); 22 (1-4); 23 (1, 2, 3-4); 24 (1, 2, 3-4); 25 (1, 2, 3-4); 26 (1-2, 3, 4); 27 (1-2, 3-4); 28 (1-2, 3-4); 29 (1-4); 30 (1, 2, 3-4); 31 (1-2, 3-4); 32 (4); 33 (1-2, 3, 4); 34 (1-2, 3-4); 35 (1-4); 36 (1, 2-4); 37 (1-4); 38 (2-4); 39 (1-2, 3, 4); 40 (1-4); 41 (1, 2-4); 42 (1-4); 43 (1-2, 3, 4); 44 (1-2, 3-12); 45 (1-12); 46 (1-12); 47 (1-12); 48 (1-10, 11-12); 49 (1-12); 50 (1-3, 4-12)
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Library of Congress
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Preserved
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2025-04-07
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49 (3 to 12); 50 (1-3, 4 to 12); 51 (1 to 9-10, 11, 12); 52 (1 to 12); 53 (1 to 3-5, 6, 7-9, 10 to 12); 54 (1 to 4-5, 6 to 11-12); 55 (1-3, 4 to 11)
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