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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 to 4); 3 (, 1-2, 3, 4); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1 to 6); 7 (, 1 to 12); 8 (, 1 to 12); 9 (, 1 to 12); 10 (, 1 to 12); 11 (, 1 to 6); 12 (, 1 to 12); 13 (, 1 to 12); 14 (, 1 to 12); 15 (, 1 to 12); 16 (, 1 to 12); 17 (, 1 to 12); 18 (, 1 to 12); 19 (, 1 to 12); 20 (, 1 to 12); 21 (, 1 to 12); 22 (, 1 to 12); 23 (, 1 to 12); 24 (, 1 to 12); 25 (, 1 to 12); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1 to 12); 29 (, 1 to 12); 30 (, 1 to 12); 31 (, 1 to 12); 32 (, 1 to 12); 33 (, 1 to 12); 34 (, 1 to 12); 35 (, 1 to 12); 36 (, 1 to 12); 37 (, 1 to 12); 38 (, 1 to 12); 39 (, 1 to 12); 40 (, 1, 2-3, 4 to 12); 41 (, 1 to 12); 42 (, 1 to 12); 43 (, 1 to 12); 44 (, 1 to 12); 45 (, 1 to 12); 46 (, 1 to 12); 47 (, 1 to 12); 48 (, 1 to 12); 49 (, 1 to 12); 50 (, 1 to 12); 51 (, 1 to 12); 52 (, 1 to 12); 53 (, 1 to 12); 54 (, 1 to 12); 55 (, 1 to 12); 56 (, 1 to 12); 57 (, 1 to 7); 1970; 1971; 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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Internet Archive
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Preserved
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2025-08-08
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1 to 43
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Portico
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Preserved
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2026-02-12
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Preserved : 1972: 3(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1973: 4(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1974: 5(5), 1975: 6(4), 1976: 7(2, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1977: 8(11), 1978: 9(4, 11), 1979: 10(10), 1980: 12(3, 5), 1981: 13(2, 7), 1982: 14(1, 7), 1983: 15(3, 7, 10)
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Portico
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Preserved
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2026-02-12
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Preserved : 1986: 18(8), 1987: 19(6, 12), 1988: 20(5)
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Portico
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Preserved
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2026-02-12
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Preserved : 1990: 22(6-7), 1991: 23(1, 6), 1992: 24(2, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1993: 25(7-8)
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Portico
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Preserved
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2026-02-12
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Preserved : 1995: 27(1, 12)
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 29(2-3, 5, 12), 1998: 30(2-3, 5-6, 10), 1999: 31(6, 9), 2000: 32(4, 12)
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Portico
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Preserved
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2026-02-12
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Preserved : 2002: 34(3, 11-12), 2003: 35(2, 5, 7, 9), 2004: 36(3, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 2005: 37(7), 2006: 38(5-6, 12), 2007: 39(3-6), 2008: 40(1, 7, 11), 2009: 41(9)
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Portico
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Preserved
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2026-02-12
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Preserved : 2010: 42(10), 2011: 43(10), 2012: 44(1, 10-11), 2013: 45(1-7, 9-12), 2014: 46(1-12), 2015: 47(1, 3-12), 2016: 48(1-12), 2017: 49(1-12), 2018: 50(1-12), 2019: 51(1-12), 2020: 52(1-12), 2021: 53(1-12), 2022: 54(1-12), 2023: 55(1-12), 2024: 56(1-12), 2025: 57(1-12), 2026: 58(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 50
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 58
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LOCKSS Archive
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In Progress
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2026-02-09
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51
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Library of Congress
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Preserved
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2025-04-07
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49 (10 to 12); 50 (1 to 12); 51 (1 to 12); 52 (1 to 12); 53 (1 to 12); 54 (1 to 12); 55 (1 to 12); 56 (1 to 10); 57 (1)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 3 (1 to 9, 11, 12); 4 (1, 2, 4 to 9, 11, 12); 5 (1 to 9, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1 to 9, 11, 12); 33 (1 to 9, 11, 12); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12)
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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 9, 11, 12); 4 (1, 2, 4 to 9, 11, 12); 5 (1 to 9, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1 to 9, 11, 12); 33 (1 to 9, 11, 12); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12)
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 29 (1-12); 30 (1-12); 31 (1-12); 32 (1-12); 33 (1-12); 34 (1-12); 35 (1-12); 36 (1-12); 37 (1-12); 38 (1-9, 11, 12); 39 (1-4, 6-12); 40 (1, 2-3, 4-12); 41 (1-12); 42 (1-12); 43 (1-12); 44 (1-12); 45 (1-12); 46 (1-12); 47 (1-12); 48 (1-12); 49 (1-12); 50 (1-12); 51 (1-10)
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