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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 3); 7 (1 to 3); 8 (1 to 3); 9 (1 to 3); 10 (1 to 3); 11 (1 to 3); 12 (1, 2/3); 13 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1-3); 20 (2, 3); 21 (1, 2-3); 22 (1 to 3); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1, 2-3); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 30 (1 to 3); 31 (1 to 3); 32 (1 to 3); 33 (1-2, 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 37 (1, 2-3); 38 (1 to 3); 39 (1 to 3); 40 (1 to 3); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 50 (1 to 3); 51 (1 to 3); 52 (1 to 3); 53 (1, 2-3); 54 (1 to 3); 55 (1, 2-3); 56 (1 to 3); 57 (1 to 3); 58 (1, 2-3); 59 (1 to 3); 60 (1 to 3); 61 (1 to 3); 62 (1 to 3); 63 (1 to 3); 64 (1 to 3); 65 (1 to 3); 66 (1 to 3); 67 (1 to 3); 68 (2, 3); 69 (1 to 3); 70 (1 to 3); 71 (1 to 3); 72 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 23
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 72
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Portico
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Preserved
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2026-04-02
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Preserved : 1989: 2(1)
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Portico
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Preserved
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2026-04-02
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Preserved : 1994: 8(3), 1994: 9(1)
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Portico
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Preserved
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2026-04-02
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Preserved : 1996: 12(2), 1997: 14(1-3), 1997: 15(1-3), 1998: 16(1-3), 1998: 17(1-3), 1999: 18(1-3), 1999: 19(1-3), 2000: 20(1-3), 2000: 21(1-3), 2001: 22(1-3), 2001: 23(1-3), 2002: 24(1-3), 2002: 25(1-3), 2003: 26(1-3), 2003: 27(1-3), 2004: 28(1-3), 2004: 29(1-3), 2005: 30(1-3), 2005: 31(1-3), 2006: 32(1-3), 2006: 33(1-3), 2007: 34(1-3), 2007: 35(1-3), 2008: 36(1-3), 2008: 37(1-3), 2009: 38(1-3), 2009: 39(1-3), 2010: 40(1-3), 2010: 41(1-3), 2011: 42(1-3), 2011: 43(1-3), 2012: 44(1-3), 2012: 45(1, 3), 2013: 46(1-3), 2013: 47(3), 2014: 48(1-3), 2014: 49(1-2), 2015: 50(1-3), 2015: 51(1-3), 2016: 52(1-3), 2016: 53(1-3), 2017: 54(1-3), 2017: 55(1-3), 2018: 56(1-3), 2018: 57(1-3), 2019: 58(1-3), 2019/2020: 59(1-3), 2020: 60(1-3), 2020: 61(1-3), 2021: 62(1-3), 2021: 63(1-3), 2022: 64(1-3), 2022: 65(1-3), 2023: 66(1-3), 2023: 67(1-3), 2024: 68(1-3), 2024: 69(1-3), 2025: 70(2-3), 2025: 71(1-3), 2026: 72(1)
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LOCKSS Archive
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In Progress
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2026-04-06
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44, 45, 58, 59
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LOCKSS Archive
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Preserved
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2026-04-06
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46 to 56
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Library of Congress
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Preserved
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2025-04-07
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55 (2-3); 56 (1 to 3); 57 (1 to 3); 58 (1, 2-3); 59 (1 to 3); 60 (1 to 3); 61 (1 to 3); 62 (1 to 3); 63 (1 to 3); 64 (1 to 3); 65 (1 to 3); 66 (1 to 3); 67 (1 to 3); 68 (1 to 3); 69 (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 : 2 (1 to 3); 3 (1 to 3); 4 (1 to 3); 5 (1 to 3); 6 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1); 21 (2); 22 (1 to 3); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1, 2); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 31 (1 to 3); 32 (1 to 3); 33 (1, 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 37 (1, 2); 38 (1 to 3); 39 (1 to 3); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 51 (1 to 3); 52 (1 to 3); 53 (1, 2); 54 (1 to 3); 55 (1, 2-3); 56 (1 to 3); 57 (1 to 3); 58 (1, 2-3); 59 (1 to 3); 61 (1 to 3); 62 (1 to 3); 63 (1 to 3); 64 (1 to 3); 65 (1 to 3); 66 (1 to 3); 67 (1 to 3); 68 (1 to 3); 69 (1 to 3)
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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 to 3); 3 (1 to 3); 4 (1 to 3); 5 (1 to 3); 6 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1); 21 (2); 22 (1 to 3); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1, 2); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 31 (1 to 3); 32 (1 to 3); 33 (1, 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 37 (1, 2); 38 (1 to 3); 39 (1 to 3); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 51 (1 to 3); 52 (1 to 3); 53 (1, 2); 54 (1 to 3); 55 (1, 2-3); 56 (1 to 3); 57 (1 to 3); 58 (1, 2-3); 59 (1 to 3); 61 (1 to 3); 62 (1 to 3); 63 (1 to 3); 64 (1 to 3); 65 (1 to 3); 66 (1 to 3); 67 (1 to 3); 68 (1 to 3); 69 (1 to 3)
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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 : 14 (1-3); 15 (1-3); 16 (1-3); 17 (1-3); 18 (1-3); 19 (1); 20 (2, 3); 21 (1, 2); 22 (1-3); 23 (1-3); 24 (1-3); 25 (1-3); 26 (1, 2); 27 (1-3); 28 (1-3); 29 (1-3); 30 (1-4); 31 (1-3); 32 (1-3); 33 (1-2, 3); 34 (1, 3); 35 (1-3); 36 (1-3); 37 (1, 2-3); 38 (1-3); 39 (1-3); 40 (1-3); 41 (1-3); 42 (1-3); 43 (1-3); 44 (1-3); 45 (1-3); 46 (1-3); 47 (1-3); 48 (1-3); 49 (1-3); 50 (1-3); 51 (1-3); 52 (1-3); 53 (2-3); 54 (1-3); 55 (1, 2-3); 56 (1-3); 57 (1-3); 58 (1, 2-3); 59 (1)
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