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Internet Archive
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Preserved
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2025-08-08
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5 to 19
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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); 3 (, 1, 2-3, 4); 4 (, 1, 2, 3-4); 5 (, 1, 2, 3-4); 6 (, 1 to 4); 7 (, 1 to 4); 8 (, 1, 2-4); 9 (, 1, 2, 3-4); 10 (, 1, 2-4); 11 (, 1-2, 3, 4); 12 (, 1, 2-3, 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (, 1, 2, 3-4); 16 (, 1, 2-3, 4); 19 (, 5); 20 (, 1); 21 (, 1 to 5); 22 (, 1, 2-3, 4); 23 (, 1 to 5); 24 (, 1-2, 3 to 5); 25 (, 1-2, 5); 26 (, 1 to 5); 27 (, 1-2, 3 to 5); 28 (, 1 to 5); 29 (, 1 to 3, 4-5); 30 (, 1 to 5); 31 (, 1-2, 3, 4-5); 32 (, 1, 2, 3-4, 5); 33 (, 1 to 5); 34 (, 1 to 5); 35 (, 1 to 3, 4-5); 36 (, 1 to 5); 37 (, 1 to 5); 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 37
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Portico
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Preserved
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2026-02-12
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Preserved : 2002: 15(1-4), 2003: 16(1-4), 2004: 17(1-4), 2005: 18(1-5), 2006: 19(1-5), 2007: 20(1-5), 2008: 21(1-5), 2009: 22(1-5), 2010: 23(1-5), 2011: 24(1-5), 2012: 25(1-5), 2013: 26(1-5), 2014: 27(1-5), 2015: 28(1-5), 2016: 29(1-5), 2017: 30(1-5), 2018: 31(1-5), 2019: 32(1-5), 2020: 33(1-5), 2021: 34(1-5), 2022: 35(1-5), 2023: 36(1-5), 2024: 37(1-5), 2025: 38(1-2)
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 37
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CLOCKSS Archive
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Preserved
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2026-02-09
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21 to 30
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LOCKSS Archive
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In Progress
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2026-02-09
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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 : 1 (1, 2-4); 2 (1, 2-3, 4, 5); 3 (1 to 5); 9 (2, 3-4); 11 (1-2, 3, 4); 12 (1, 2-3, 4); 13 (1 to 4); 14 (1 to 4); 15 (1, 2, 3-4); 16 (1, 2-3, 4); 17 (1, 2, 3-4); 18 (1, 2-3, 4, 5); 19 (1, 2, 3-4, 5); 21 (1 to 5); 22 (1, 2-3, 4, 5); 23 (1 to 5); 24 (1-2, 3 to 5); 25 (1-2, 3 to 5); 26 (1 to 5); 27 (1-2, 3 to 5); 28 (1 to 5); 29 (1 to 3, 4-5); 31 (1-2, 3, 4-5); 32 (1, 2, 3-4, 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 3, 4-5); 36 (1, 3, 5); 37 (1 to 5)
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Library of Congress
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Preserved
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2025-04-07
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23 (1 to 5); 24 (1-2, 3 to 5); 25 (1-2, 3 to 5); 26 (1 to 5); 27 (1-2, 3 to 5); 28 (1 to 5); 29 (1 to 4-5); 30 (1 to 5); 31 (1-2, 3, 4-5); 32 (1, 3-4, 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 4-5); 36 (1 to 5); 37 (1 to 4)
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