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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 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 7); 58 (, 1 to 7); 59 (, 1 to 7); 60 (, 1 to 7); 61 (, 1 to 7); 62 (, 1, 2, 4 to 7); 63 (, 1 to 7); 64 (, 1 to 4, 6); 65 (, 1 to 6); 1965; 1966; 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
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Internet Archive
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Preserved
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2025-08-08
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to 35
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CLOCKSS Archive
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Preserved
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2026-02-09
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6 to 66
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Portico
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Preserved
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2026-02-12
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Preserved : 1965: 6(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1968: 9(5)
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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 12(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1978: 19(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1984: 25(4, 6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1992: 33(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 38(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1999: 40(1, 4-5)
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Portico
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Preserved
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2026-02-12
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Preserved : 2006: 47(5-6), 2007: 48(3), 2008: 49(1, 3), 2009: 50(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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53, 60
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Portico
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Preserved
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2026-02-12
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Preserved : 2012: 53(6), 2013: 54(1-6), 2014: 55(1-5), 2015: 56(1, 3-6), 2016: 57(1-7), 2017: 58(1-7), 2018: 59(1-7), 2019/2020: 60(1-7), 2020: 61(1-7), 2021: 62(1-7), 2022: 63(1-7), 2023: 64(1-6), 2024: 65(1-6), 2025: 66(1-5)
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LOCKSS Archive
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Preserved
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2026-02-09
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54 to 59
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Library of Congress
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Preserved
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2025-04-07
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58 (6, 7); 59 (1 to 7); 60 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 6); 65 (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 : 4 (1 to 6); 5 (1 to 6); 6 (1 to 7); 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 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 7); 58 (1 to 7); 59 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 4); 65 (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); 6 (1 to 7); 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 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 7); 58 (1 to 7); 59 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 4); 65 (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 : 5 (1); 49 (4, 5); 51 (2 to 6); 52 (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 : 5 (1); 49 (4, 5); 51 (2 to 6); 52 (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 : 36 (C); 41 (6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-5); 49 (1-6); 50 (1-6); 51 (1-6); 52 (1-6); 53 (1-6); 54 (1-6); 55 (1-6); 56 (1-6); 57 (1-7); 58 (1-7); 59 (1-7); 60 (1-4)
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