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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 6); 2 (, 1 to 6); 3 (, 1 to 6); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1 to 6); 7 (, 1 to 6); 8 (, 1 to 6); 9 (, 1 to 6); 10 (, 1 to 6); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1-2, 3 to 6); 14 (, 1 to 6); 15 (, 1 to 3, 4-5, 6); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 19 (, 1, 2-3, 4 to 6); 20 (, 1 to 3, 4-5, 6); 21 (, 1, 2, 3-4, 5, 6); 22 (, 1 to 6); 23 (, 1 to 6); 24 (, 1 to 6); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 1 to 6); 28 (, 1 to 6); 29 (, 1 to 6); 30 (, 1 to 6); 31 (, 1 to 6); 32 (, 1 to 6); 33 (, 1 to 8); 34 (, 1 to 4, 5-6, 7-8); 35 (, 1, 2 to 4, 5, 6-7, 8); 36 (, 1-2, 2 to 8); 37 (, 1 to 8); 38 (, 1 to 8); 39 (, 1 to 8); 40 (, 1 to 6, 7-8); 41 (, 1 to 8); 42 (, 1 to 8); 43 (, 1 to 8); 44 (, 1 to 8); 45 (, 1 to 8); 46 (, 1 to 8); 47 (, 1 to 8); 48 (, 1 to 8); 49 (, 1 to 6); 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 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; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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15 to 29
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Portico
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Preserved
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2026-02-12
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Preserved : 1986: 10(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1992: 16(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 2009/2010: 33(1-2, 4, 6-8), 2010: 34(2-8), 2011: 35(1-8), 2012: 36(1-8), 2013: 37(1-8), 2014: 38(1-8), 2015: 39(1-6)
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 48
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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 49
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LOCKSS Archive
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In Progress
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2026-02-09
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49
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 21(1-6), 1998: 22(1-6), 1999: 23(1-6), 2000: 24(1-6), 2001: 25(1-6), 2002: 26(1-6), 2003: 27(1-6), 2004: 28(1-6), 2005: 29(1-6), 2006: 30(1-6), 2007: 31(1-6), 2008: 32(1-6), 2009: 33(1-8), 2010: 34(1-4), 2011: 35(1-2, 5, 8), 2012: 36(1-8), 2013: 37(1-8), 2014: 38(1-8), 2015: 39(1-8), 2016: 40(1-8), 2017: 41(1-8), 2018: 42(1-8), 2019: 43(1-8), 2020: 44(1-8), 2021: 45(1-8), 2022: 46(1-8), 2023: 47(1-8), 2024: 48(1-8), 2025: 49(1-3, 5-8), 2026: 50(1-2)
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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 : 3 (2 to 6); 4 (1 to 6, 7-8); 21 (1, 2, 3-4, 5, 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 8); 34 (1 to 4, 5-6, 7-8); 35 (1, 2, 3-4, 5, 6-7, 8); 36 (1 to 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 8); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 8); 46 (1 to 8); 47 (1 to 8); 48 (1 to 7); 49 (2)
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Library of Congress
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Preserved
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2025-04-07
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34 (1 to 5-6, 7-8); 35 (1 to 3-4, 5, 6-7, 8); 36 (1 to 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 8); 40 (1 to 7-8); 41 (1 to 8); 42 (1 to 4, 6 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 8); 46 (1 to 8); 47 (1 to 8); 48 (1 to 4)
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