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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); 2 (, 1); 3 (, 1); 4 (, 1); 5 (, 1 to 12); 6 (, 1 to 12); 7 (, 1 to 12); 8 (, 1 to 12); 9 (, 1 to 12); 10 (, 1 to 12); 11 (, 1 to 12); 12 (, 1 to 12); 13 (, 1 to 12); 14 (, 1 to 14); 15 (, 1 to 14); 16 (, 1 to 14); 17 (, 1 to 16); 18 (, 1 to 14, 15-16); 19 (, 1, 2, 3-5, 6 to 12, 13-14, 15, 16); 20 (, 1, 2-3, 4 to 16); 21 (, 1, 2, 3-4, 5-6, 7 to 11, 12-13, 14 to 16); 22 (, 1, 2, 3-4, 5-6, 7, 8-9, 10-11, 12 to 16); 23 (, 1 to 6, 7-8, 9, 10-11, 12, 13-14, 15, 16); 24 (, 1 to 7, 8-10, 11-12, 13-14, 15-16); 25 (, 1-3, 4-5, 6-7, 8 to 20); 26 (, 1-3, 18-19, 20-21, 22 to 24); 27 (, 1 to 4, 5-6, 7 to 17, 18-19, 20 to 24); 28 (, 1, 2, 3-4, 5 to 7, 8-9, 10 to 13, 14-15, 16 to 21, 22-23, 24); 29 (, 1 to 24); 30 (, 1 to 13, 15, 17 to 24); 31 (, 1 to 18, 19-20, 21 to 24); 32 (, 1 to 4, 8 to 24); 33 (, 1 to 24); 34 (, 1 to 24); 35 (, 1 to 24); 36 (, 1 to 22, 23-24); 37 (, 1 to 24); 38 (, 1 to 5, 7 to 24); 39 (, 1 to 15); 1987; 1988; 1989; 1990; 1991; 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 : 1987: 1(1), 1988: 2(1), 1989: 3(1), 1990: 4(1), 1991: 5(1-12), 1992: 6(1-12), 1993: 7(1-12), 1994: 8(1-12), 1995: 9(1-12), 1996: 10(1-12), 1997: 11(1-12), 1998: 12(1-12), 1999: 13(1-12), 2000: 14(1-14), 2001: 15(1-14), 2002: 16(1-14), 2003: 17(1-16), 2004: 18(1-15), 2005: 19(1-3, 6-13, 15-16), 2006: 20(2, 4-10, 12-16), 2007: 21(1, 7-12, 14-16), 2008: 22(1-3, 5, 7-8, 10, 12-16), 2009: 23(1-4, 12-13, 15-16), 2010: 24(1-8, 11, 13, 15), 2011: 25(1, 4, 6, 8-17)
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 38
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CLOCKSS Archive
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Preserved
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2026-02-09
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ahead-of-print to 24, 28 to 40
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LOCKSS Archive
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In Progress
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2026-02-09
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39
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 1(1), 1988: 2(1), 1989: 3(1), 1990: 4(1), 1991: 5(1-12), 1992: 6(1-12), 1993: 7(1-12), 1994: 8(1-12), 1995: 9(1-12), 1996: 10(1-12), 1997: 11(1-12), 1998: 12(1-12), 1999: 13(1-12), 2000: 14(1-14), 2001: 15(1-14), 2002: 16(1-14), 2003: 17(1-16), 2004: 18(1-16), 2005: 19(1-16), 2006: 20(1-16), 2007: 21(1-16), 2008: 22(1-16), 2009: 23(1-16), 2010: 24(1-16), 2011: 25(1-20), 2012: 26(1-11, 18-24), 2013: 27(1-24), 2014: 28(1-24), 2015: 29(1-24), 2016: 30(1-24), 2017: 31(1-24), 2018: 32(1-24), 2019: 33(1-24), 2020: 34(1-24), 2021: 35(1-24), 2022: 36(1-24), 2023: 37(1-24), 2024: 38(1-24), 2025: 39(1-24), 2026: 40(1-3)
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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 (2-3, 4 to 9, 11 to 16); 3 (1 to 9, 11 to 19, 21 to 24); 11 (1 to 9, 11, 12); 12 (1 to 9, 11, 12); 13 (1 to 9, 11, 12); 14 (1 to 9, 11 to 14); 15 (1 to 9, 11 to 14); 16 (1 to 9, 11 to 14); 17 (1 to 9, 11 to 16); 18 (1 to 9, 11 to 14, 15-16); 19 (1, 2, 3-5, 6 to 9, 11, 12, 13-14, 15, 16); 21 (1, 2, 3-4, 5-6, 7 to 9, 11, 12-13, 14 to 16); 22 (1, 2, 3-4, 5-6, 7, 8-9, 12 to 16); 23 (1 to 6, 7-8, 9, 12, 13-14, 15, 16); 24 (1 to 7, 8-1, 11-12, 13-14, 15-16); 25 (1-3, 2, 4-5, 6-7, 8, 9, 11 to 19); 26 (1-3, 2-21, 4-5, 6, 7, 8-9, 12-17, 18-19, 22 to 24); 27 (1 to 4, 5-6, 7 to 9, 11 to 17, 18-19, 21 to 24); 28 (1, 2, 3-4, 5 to 7, 8-9, 11 to 13, 14-15, 16 to 19, 21, 22-23, 24); 29 (1 to 9, 11 to 19, 21 to 24); 31 (1 to 9, 11 to 18, 19-2, 21 to 24); 32 (1 to 9, 11 to 19, 21 to 24); 33 (1 to 9, 11 to 19, 21 to 24); 34 (1 to 9, 11 to 19, 21 to 24); 35 (1 to 9, 11 to 19, 21 to 24); 36 (1 to 9, 11 to 19, 21, 22, 23-24); 37 (1 to 8, 11 to 19, 21, 22, 24); 38 (1 to 9, 11 to 19, 21 to 24); 39 (1 to 4, 8, 9)
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Library of Congress
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Preserved
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2025-04-07
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24 (1 to 8-10, 11-12, 13-14, 15-16); 25 (1-3, 4-5, 6-7, 8 to 20); 26 (1-3, 4-5, 6 to 8-9, 10-11, 12-17, 18-19, 20-21, 22 to 24); 27 (1 to 5-6, 7 to 18-19, 20 to 24); 28 (1 to 3-4, 5 to 8-9, 10 to 14-15, 16 to 22-23, 24); 29 (1 to 24); 30 (1 to 24); 31 (1 to 19-20, 21 to 24); 32 (1 to 24); 33 (1 to 14, 16 to 24); 34 (1 to 24); 35 (1 to 24); 36 (1 to 23-24); 37 (1 to 13, 15 to 24); 38 (1 to 21)
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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 : 1; 2; 3; 4; 5 (2-12); 6 (1-12); 7 (1-12); 8 (1-12); 9 (1-12); 10 (1-12); 11 (1-12); 12 (1-7, 9-12); 13 (1-12); 14 (1-14); 15 (1-14); 16 (1-14); 17 (1-16); 18 (1-15); 19 (1-3, 6-9, 11-13, 15, 16); 20 (2, 4-6, 8, 12-16); 21 (1, 7-12, 14-16); 22 (1-3, 5, 7, 8, 10, 12-16); 23 (1-7, 9, 10, 12, 13, 15, 16); 24 (1-9, 11, 13, 15); 25 (1, 4, 6, 8-19)
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