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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 to 6); 14 (, 1 to 6); 15 (, 1 to 6); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 19 (, 1 to 6); 20 (, 1 to 6); 21 (, 1 to 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 6); 34 (, 1 to 6); 35 (, 1 to 6); 36 (, 1 to 6); 37 (, 1 to 6); 38 (, 1 to 6); 39 (, 1 to 6); 40 (, 1 to 6); 41 (, 1 to 6); 42 (, 1 to 6); 43 (, 1 to 6); 44 (, 1 to 6); 45 (, 1 to 6); 46 (, 1 to 6); 47 (, 1 to 6); 48 (, 1 to 6); 49 (, 1 to 6); 50 (, 1 to 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1 to 6); 1967; 1968; 1969; 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 10
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LOCKSS Archive
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In Progress
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2026-02-09
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Portico
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Preserved
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2026-02-12
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Preserved : 1967: 1(1-6), 1968: 2(1-6), 1969: 3(1-6), 1970: 4(1-6), 1971: 5(1-6), 1972: 6(1-6), 1973: 7(1-6), 1974: 8(1-6), 1975: 9(1-6), 1976: 10(1-6), 1977: 11(1-6), 1978: 12(1-6), 1979: 13(1-6), 1980: 14(1-6), 1981: 15(1-6), 1982: 16(1-6), 1983: 17(1-6), 1984: 18(1-6), 1985: 19(1-6), 1986: 20(1-6), 1987: 21(1-6), 1988: 22(1-6), 1989: 23(1-6), 1990: 24(1-6), 1991: 25(1-6), 1992: 26(1-6), 1993: 27(1-6), 1994: 28(1-6), 1995: 29(1-6), 1996: 30(1-6)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 59
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Portico
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Preserved
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2026-02-12
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Preserved : 1999: 33(3, 5)
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Portico
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Preserved
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2026-02-12
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Preserved : 2003: 37(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 2004: 38(3, 5), 2005: 39(4, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 2012: 45(6), 2012/2013: 46(4-6), 2013/2014: 47(1-2, 4-6), 2014/2015: 48(1-6), 2015/2016: 49(1-6), 2016/2017: 50(1-6), 2017/2018: 51(1-6), 2018/2019: 52(1-6), 2019/2020: 53(1-6), 2020/2021: 54(1-6), 2021/2022: 55(1-6), 2022/2023: 56(1-6), 2023/2024: 57(1-6), 2024/2025: 58(1-3, 5-6), 2025: 59(1-2)
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Library of Congress
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Preserved
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2025-04-07
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51 (6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 3)
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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 : 4 (1 to 6); 5 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (3 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 5); 51 (1 to 6); 52 (1 to 6); 53 (1 to 4, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 4)
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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 : 4 (1 to 6); 5 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (3 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 5); 51 (1 to 6); 52 (1 to 6); 53 (1 to 4, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 4)
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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 : 44 (1 to 6); 45 (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 : 44 (1 to 6); 45 (1, 2)
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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 : 20 (3); 34 (5, 6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6); 39 (1-6); 40 (1, 2, 4-6); 41 (1-6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-6); 49 (1-6); 50 (1-6); 51 (1-6); 52 (1-6); 53 (1-3)
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