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Internet Archive
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Preserved
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2025-08-08
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1 to 25
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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 (, 1-2, 3 to 6, 7-8, 9); 6 (, 1 to 6); 7 (, 1 to 6); 8 (, 1 to 4, 5-6); 9 (, 1 to 8); 10 (, 1 to 3, 4-5, 6 to 8); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1 to 6); 14 (, 1 to 6); 15 (, 1 to 8); 16 (, 1 to 8); 17 (, 1 to 5, 6-7, 8-9); 18 (, 1-4, 5 to 8, 9-10); 19 (, 1 to 4, 5-6); 20 (, 1 to 4, 5-6, 7); 21 (, 1 to 7); 22 (, 1 to 5, 6-7, 8); 23 (, 1 to 3, 4-5, 6-7); 24 (, 1-2, 3 to 6); 25 (, 1-2, 3, 4, 5-6); 26 (, 1-2, 3, 4, 5-7); 27 (, 1-2, 3, 4-5, 6); 28 (, 1, 2-3, 4, 5-6); 29 (, 1 to 4); 30 (, 1 to 4); 31 (, 1, 2, 3-4); 32 (, 1-2, 3, 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1, 2, 3-4); 36 (, 1 to 4, 5-6); 37 (, 1 to 4, 5-6, 7, 8); 38 (, 1, 2, 3-4, 5 to 8); 39 (, 1 to 3, 4-5, 6 to 8); 40 (, 1 to 6, 7-8); 41 (, 1 to 5, 6-7, 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 (, 1-2, 3 to 8); 50 (, 1, 2-3, 4 to 8); 51 (, 1 to 8); 52 (, 1 to 8); 53 (, 1 to 8); 54 (, 1 to 6); 1972; 1973; 1974; 1975; 1976; 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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Portico
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Preserved
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2026-02-12
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Preserved : 1975: 4(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 2007: 36(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 2009: 38(8), 2010: 39(1-8), 2011: 40(1-8), 2012: 41(1-8), 2013: 42(1-8), 2014: 43(1-8), 2015: 44(1-6)
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LOCKSS Archive
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Preserved
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2026-02-09
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14 to 53
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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, 14 to 54
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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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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 26(1-7), 1998: 27(1-6), 1999: 28(1-6), 2000: 29(1-4), 2001: 30(1-2), 2002: 31(1-2), 2003: 32(1-4), 2004: 33(1-4), 2005: 34(1-4), 2006: 35(1-4), 2007: 36(1-6), 2008: 37(1-8), 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(1-2)
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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 (1 to 4); 4 (1 to 6, 7-8); 5 (1, 2-3, 4 to 8); 26 (1-2, 3, 4, 5-7); 27 (1-2, 3, 4-5, 6); 28 (1, 2-3, 4, 5-6); 29 (1 to 4); 31 (1, 2, 3-4); 32 (1-2, 3, 4); 33 (1 to 4); 34 (1 to 4); 35 (1, 2, 3-4); 36 (1 to 4, 5-6); 37 (1 to 4, 5-6, 7, 8); 38 (1, 2, 3-4, 5 to 8); 39 (1 to 3, 4-5, 6 to 8); 41 (1 to 5, 6-7, 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 (1-2, 3 to 8); 51 (1 to 8); 52 (1 to 8); 53 (1 to 8); 54 (1 to 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 4-5, 6 to 8); 40 (1 to 7-8); 41 (1 to 6-7, 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 (1-2, 3 to 8); 50 (1, 2-3, 4 to 8); 51 (1 to 8); 52 (1 to 8); 53 (1 to 8)
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