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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 3); 2 (, 1 to 3); 3 (, 1 to 3); 4 (, 1, 2-3); 5 (, 1 to 3); 6 (, 1 to 3); 12 (, 1 to 3); 13 (, 1-2, 3, 4); 14 (, 1 to 4); 15 (, 1-3, 4); 16 (, 1-2, 3-4); 17 (, 1-2, 3-4); 18 (, 1, 2-3, 4); 19 (, 1, 2, 3-4); 20 (, 1, 2, 3-4); 21 (, 1 to 4); 22 (, 1 to 4); 23 (, 1 to 4); 24 (, 1-2, 3 to 6); 25 (, 1 to 6); 26 (, 1, 2, 3-4, 5, 6); 27 (, 1 to 6); 28 (, 1 to 6); 29 (, 1 to 6); 30 (, 1 to 6); 31 (, 1 to 6); 32 (, 1 to 8); 33 (, 1 to 8); 34 (, 1, 2, 3-4, 5 to 8); 35 (, 1 to 8); 36 (, 1 to 8); 37 (, 1 to 8); 38 (, 1 to 8); 39 (, 1 to 8); 40 (, 1 to 8); 41 (, 1 to 3, 7, 8); 42 (, 1 to 8); 43 (, 1 to 8); 44 (, 1 to 5, 7, 8); 45 (, 1, 3 to 8); 46 (, 1 to 6); 47 (, 1 to 8); 48 (, 1 to 8); 49 (, 1 to 8); 50 (, 1 to 8); 51 (, 1 to 8); 52 (, 1 to 8); 53 (, 2 to 8); 54 (, 1 to 6); 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 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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Portico
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Preserved
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2026-02-12
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Preserved : 1991: 20(1-2), 1992: 21(1-4), 1993: 22(1-4), 1994: 23(1-4), 1995: 24(3-6), 1995/1996: 25(1-6), 1997: 26(1-2, 5-6), 1998: 27(1-6), 1998/1999: 28(1-6), 2000: 29(1-6), 2001: 30(1-6), 2002: 31(1-6), 2003: 32(1-8), 2004: 33(1-8), 2004/2005: 34(1-8), 2006: 35(1-8), 2007: 36(1-8), 2008: 37(1-8), 2008/2009: 38(1-8), 2010: 39(1-8), 2011: 40(1-8), 2012: 41(1-8), 2013: 42(1-8), 2014: 43(1-8), 2015: 44(1-8), 2016: 45(1-8), 2017: 46(1-8), 2018: 47(1-8), 2019: 48(1-8), 2020: 49(1-8), 2021: 50(1-8), 2022: 51(1-8), 2023: 52(1-8), 2024: 53(1-8), 2025: 54(1-8), 2026: 55(1)
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 53
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CLOCKSS Archive
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Preserved
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2026-02-09
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37, 39 to 46
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LOCKSS Archive
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In Progress
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2026-02-09
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54
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 54
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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 (1 to 6); 4 (1 to 8); 5 (1 to 8); 26 (1, 2, 3-4, 5, 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 8); 33 (1 to 8); 34 (1, 2, 3-4, 5 to 8); 35 (1 to 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 8); 49 (1 to 8); 51 (1 to 8); 52 (1 to 7); 53 (1 to 8); 54 (1, 3)
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Library of Congress
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Preserved
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2025-04-07
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39 (1 to 8); 40 (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, 2, 4 to 8); 49 (1 to 8); 50 (1 to 8); 51 (1 to 8); 52 (1 to 8); 53 (1 to 7)
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