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Internet Archive
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Preserved
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2025-08-08
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1 to 10
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 3 (2 to 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 7 (, 1, 2-3, 4); 8 (, 1 to 4); 9 (, 1 to 4); 10 (, 1 to 4); 11 (, 1, 2, 3-4); 12 (, 1, 2, 3-4); 13 (, 1, 2, 3-4); 14 (, 1 to 4); 15 (, 1 to 4); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 4); 19 (, 1 to 4); 20 (, 1, 2-3, 4); 21 (, 1 to 4); 22 (, 1 to 4); 23 (, 1-2, 3, 4); 24 (, 1 to 4); 25 (, 1-2, 3, 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1, 4); 29 (, 1-2, 3, 4); 30 (, 1 to 4); 31 (, 1-2, 3-4); 32 (, 3-4); 33 (, 1-2, 3-4); 34 (, 1-2, 3-4); 35 (, 1-2, 3-4); 36 (, 1 to 4); 37 (, 1 to 3); 38 (, 1 to 3); 1986; 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
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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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24 to 33
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Portico
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Preserved
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2026-02-12
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Preserved : 1983/1986/1987: 3(1-4), 1987/1988: 4(1-4), 1988/1989: 5(1-4), 1989/1990: 6(1-4), 1990/1991: 7(1, 4), 1991/1992: 8(1-4), 1993/1994: 9(1-4), 1994/1995: 10(1-4), 1995: 11(1-2), 1996: 12(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 13(1-2), 1998/1999: 14(1-4), 1999/2000: 15(1-4), 2000: 16(1-4), 2001: 17(1-4), 2002: 18(1-4), 2003: 19(1-4), 2004: 20(1, 4), 2005: 21(1-4), 2006: 22(1-4), 2007: 23(3-4), 2008: 24(1-4), 2009: 25(1-4), 2010: 26(1-4), 2011: 27(1-4), 2012: 28(1-4), 2013: 29(1-4), 2014: 30(1-4), 2015: 31(1-4), 2016: 32(1-4), 2017: 33(1-4), 2018: 34(1-4), 2019: 35(1-4), 2020: 36(1-4), 2021: 37(1-4), 2022: 38(1-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 38
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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, 2-3, 4); 3 (1 to 4); 12 (3-4); 13 (1, 2, 3-4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 4); 19 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1-2, 3, 4); 24 (1 to 4); 25 (1-2, 3, 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (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 (1-2, 3-4); 36 (1 to 4); 37 (1 to 4); 38 (1, 2)
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Library of Congress
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Preserved
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2025-04-07
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26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1-2, 3, 4); 30 (1 to 4); 31 (1-2, 3-4); 32 (1-2, 3-4); 33 (1-2, 3-4); 34 (1-2, 3-4); 35 (1-2, 3-4); 36 (1 to 4); 37 (1 to 4); 38 (1, 2)
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