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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, 2, 3-4); 2 (, 1, 2-3, 4); 3 (, 1 to 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 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 3, 4-5, 6); 53 (, 1 to 4, 5-6); 54 (, 1 to 6); 55 (, 1 to 3); 1970; 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 42
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Portico
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Preserved
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2026-02-12
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Preserved : 1970: 1(2-4), 1972: 2(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 48
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 56
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Portico
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Preserved
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2026-02-12
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Preserved : 1976: 6(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1979: 9(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1984: 14(3, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1986: 16(4), 1987: 17(3), 1988: 18(2, 5), 1989: 19(2), 1990: 20(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1991: 21(5)
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Portico
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Preserved
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2026-02-12
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Preserved : 1993: 23(3, 5-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 26(2-6), 1997: 27(1-6), 1998: 28(1-6), 1999: 29(1-6), 2000: 30(1-6), 2001: 31(1-6), 2002: 32(1-6), 2003: 33(1-6), 2004: 34(1-6), 2005: 35(1-6), 2006: 36(1-6), 2007: 37(1-6), 2008: 38(1-6), 2009: 39(1-6), 2010: 40(1-6), 2011: 41(1-6), 2012: 42(1-4, 6), 2013: 43(1-6), 2014: 44(1-6), 2015: 45(2-6), 2016: 46(1-6), 2017: 47(1-6), 2018: 48(1-6), 2019: 49(1-6), 2019/2020: 50(1-6), 2021: 51(1-6), 2022: 52(1-6), 2023: 53(2-6), 2024: 54(1-5), 2025: 55(1-6), 2026: 56(1)
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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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Library of Congress
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Preserved
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2025-04-07
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47 (6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 4-5, 6); 53 (1 to 5-6); 54 (1 to 5)
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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 6); 4 (1 to 6); 5 (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 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 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 3, 4-5, 6); 53 (1 to 4, 5-6); 54 (1 to 6)
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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 6); 5 (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 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 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 3, 4-5, 6); 53 (1 to 4, 5-6); 54 (1 to 6)
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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 : 27 (1-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1-6); 32 (1-3, 5, 6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-5); 37 (1, 4, 5); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-4, 6); 48 (1-6); 49 (1-6)
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