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Internet Archive
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Preserved
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2025-08-08
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1 to 12
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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, 2, 3-4, 5-6, 7, 8); 3 (, 1 to 8); 4 (, 1 to 12); 5 (, 1 to 3, 4-5, 6 to 12); 6 (, 1-4, 5-6, 7 to 12); 7 (, 1 to 12); 8 (, 1 to 8, 9-10, 11, 12); 9 (, 1-2, 3, 4, 5-6, 7-8, 9, 10, 11-12); 10 (, 1 to 12); 11 (, 1 to 12); 12 (, 1 to 12); 13 (, 1 to 12); 14 (, 1 to 3, 5 to 12); 15 (, 1 to 12); 16 (, 1 to 12); 17 (, 1, 2, 4 to 12); 18 (, 1 to 12); 19 (, 1 to 15); 20 (, 1 to 15); 21 (, 1 to 15); 22 (, 1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 23 (, 1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 24 (, 1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 25 (, 1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 26 (, 1, 2-3, 4, 13, 14-15, 16, 17-18); 27 (, 1 to 18); 28 (, 1 to 18); 29 (, 1 to 12, 14 to 18); 30 (, 1 to 18); 31 (, 1 to 10, 11-12, 13 to 18); 32 (, 1, 3 to 18); 33 (, 1 to 18); 34 (, 1 to 18); 35 (, 1 to 18); 36 (, 1 to 18); 37 (, 1 to 6, 7-9, 10-12, 13 to 18); 38 (, 1 to 3, 5 to 18); 39 (, 1 to 12); 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 : 1988: 2(3, 5)
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Portico
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Preserved
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2026-02-12
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Preserved : 1989: 3(3, 8), 1990: 4(10, 12), 1991: 5(4), 1992: 6(1, 5, 12), 1993: 7(1-12), 1994: 8(1, 3, 8-9), 1995: 9(1, 5, 7, 11), 1996: 10(1-12), 1997: 11(1-12), 1998: 12(1-12), 1999: 13(1-12), 2000: 14(1-3, 5-12), 2001: 15(1-12), 2002: 16(1-12), 2003: 17(1-2, 4-12), 2004: 18(1-12), 2005: 19(1-15), 2006: 20(1-15), 2007: 21(1-4, 8-15), 2008: 22(1-2, 4-5, 7-8, 14, 16-17), 2009: 23(1-2, 4, 10-11, 13-14, 16-17), 2010: 24(1-2, 4-5, 7, 11, 13-14, 16-17), 2011: 25(1-2, 4-5, 7-8, 10-11)
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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 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(1-4), 1988: 2(1-8), 1989: 3(1-8), 1990: 4(1-12), 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(1-12), 2001: 15(1-12), 2002: 16(1-12), 2003: 17(1-12), 2004: 18(1-12), 2005: 19(1-15), 2006: 20(1-15), 2007: 21(1-15), 2008: 22(1-18), 2009: 23(1-18), 2010: 24(1-18), 2011: 25(1-18), 2012: 26(1-10, 13-18), 2013: 27(1-18), 2014: 28(1-18), 2015: 29(1-18), 2016: 30(1-18), 2017: 31(1-18), 2018: 32(1-18), 2019: 33(1-18), 2020: 34(1-18), 2021: 35(1-18), 2022: 36(1-18), 2023: 37(1-18), 2024: 38(1-18), 2025: 39(1-18), 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 (1 to 9, 11 to 15); 3 (1 to 9, 11 to 18); 11 (1 to 9, 11, 12); 12 (1 to 9, 11, 12); 13 (1 to 9, 11, 12); 14 (1 to 9, 11, 12); 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 to 15); 21 (1 to 9, 11 to 15); 22 (1, 2-3, 4, 5-6, 7, 8-9, 11-12, 13, 14-15, 16, 17-18); 23 (1, 2-3, 4, 5-6, 7, 8-9, 11-12, 13, 14-15, 16, 17-18); 24 (1, 2-3, 4, 5-6, 7, 8-9, 11-12, 13, 14-15, 16, 17-18); 25 (1, 2-3, 4, 5-6, 7, 8-9, 11-12, 13, 14-15, 16, 17-18); 26 (1, 2-3, 4, 5-6, 7, 8-9, 11-12, 13, 14-15, 16, 17-18); 27 (1 to 9, 11 to 18); 28 (1 to 9, 11 to 18); 29 (1 to 9, 11 to 18); 31 (1 to 9, 11-12, 13 to 18); 32 (1 to 9, 11 to 18); 33 (1 to 9, 11 to 18); 34 (1 to 9, 11 to 18); 35 (1 to 9, 11 to 18); 36 (1 to 9, 11 to 18); 37 (1 to 6, 7-9, 13 to 18); 38 (1 to 9, 11 to 18); 39 (1 to 4, 7)
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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, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 25 (1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 26 (1, 2-3, 4, 5-6, 7, 8-9, 10, 11-12, 13, 14-15, 16, 17-18); 27 (1 to 18); 28 (1 to 18); 29 (1 to 18); 30 (1 to 18); 31 (1 to 11-12, 13 to 18); 32 (1 to 18); 33 (1 to 10, 12 to 18); 34 (1 to 16, 18); 35 (1 to 18); 36 (1 to 18); 37 (1 to 7-9, 10-12, 13 to 18); 38 (1 to 18)
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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 : 2 (1, 3, 5); 3 (3, 8); 4 (10, 12); 5 (4); 6 (1, 5, 12); 7 (1-12); 8 (1, 3, 8, 9); 9 (1, 5, 7, 11); 10 (1-12); 11 (1-12); 12 (1-12); 13 (1-12); 14 (1-3, 5-12); 15 (1-12); 16 (1-12); 17 (1, 2, 4-12); 18 (1-12); 19 (1-15); 20 (1-8, 10-15); 21 (1-4, 8-15); 22 (1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17); 23 (1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17); 24 (1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17); 25 (1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17)
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