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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 to 6); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1, 2-3, 4); 7 (, 1, 2, 3-4); 8 (, 1 to 4); 9 (, 1 to 4); 10 (, 1 to 4); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 14 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 15 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 16 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 17 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 18 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 19 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 20 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 21 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 22 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 23 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 24 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 25 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 26 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 27 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 28 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 29 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 30 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 31 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 32 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 33 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 34 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 35 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 36 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 37 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 38 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 39 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 40 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 41 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 42 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 43 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 44 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 45 (, 1-2, 3-4, 5-6, 7-8, 9, 11-12); 46 (, 1-2, 3-4, 5-6, 7, 9-10, 11-12); 47 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 48 (, 1-2, 3, 5, 7-8, 9, 11-12); 49 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 50 (, 1-2, 3, 5-6, 7-8, 9-10, 11-12); 51 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 52 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 53 (, 1-3, 4-6, 7-8, 9-10, 11-12); 54 (, 1 to 6); 55 (, 1 to 4, 5-6); 56 (, 1-2, 3 to 6); 57 (, 1 to 6); 58 (, 1 to 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 3); 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 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 63
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Portico
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Preserved
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2026-02-12
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Preserved : 1969: 3(6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1973: 9(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1979: 17(5-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1981: 19(11-12)
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Portico
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Preserved
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2026-02-12
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Preserved : 1983: 21(1-2, 11-12)
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Portico
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Preserved
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2026-02-12
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Preserved : 1985: 23(9-10)
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 25(5-6, 9-10), 1988: 26(3-4, 7-10), 1989: 27(7-8), 1990: 28(5-8)
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Portico
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Preserved
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2026-02-12
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Preserved : 1991: 29(9-10), 1992: 30(3-4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1994: 32(9-10)
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 34(3-4, 7-8)
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Portico
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Preserved
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2026-02-12
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Preserved : 2000: 38(3-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 2001: 39(7-8)
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Portico
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Preserved
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2026-02-12
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Preserved : 2007: 45(3-6, 11-12), 2008: 46(1-12), 2009: 47(1-12), 2009/2010: 48(1-12), 2011: 49(1-12), 2012: 50(1-6), 2013: 51(1-12), 2014: 52(1-12), 2015: 53(1-12), 2016: 54(1-6), 2017: 55(1-6), 2018: 56(1-6), 2019: 57(1-6), 2019/2020: 58(1-6), 2021: 59(1-6), 2022: 60(1-6), 2023: 61(1-6), 2024: 62(1-5), 2025: 63(1-6), 2026: 64(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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50, 57
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LOCKSS Archive
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Preserved
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2026-02-09
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51 to 56
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Library of Congress
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Preserved
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2025-04-07
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54 (3); 55 (1); 56 (1-2, 3 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 6); 61 (1 to 6); 62 (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 : 4 (1, 3, 5, 7, 9, 11); 5 (1, 3, 5, 7, 9, 11); 6 (1 to 6); 35 (1, 3, 5, 7, 9, 11); 36 (1, 3, 5, 7, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11); 41 (1, 3, 5, 7, 9, 11); 42 (1, 3, 5, 7, 9, 11); 43 (1, 3, 5, 7, 9, 11); 44 (1, 3, 5, 7, 9, 11); 45 (1, 3, 5, 7, 9, 11); 46 (1, 3, 5, 7, 9, 11); 47 (1, 3, 5, 7, 9, 11); 48 (1, 3, 5, 7, 9, 11); 49 (1, 3, 5, 7, 9, 11); 51 (1, 3, 5, 7, 9, 11); 52 (1, 3, 5, 7, 9, 11); 53 (1, 4, 7, 9, 11); 54 (1 to 6); 55 (1 to 5); 56 (1-2, 3 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (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 : 4 (1, 3, 5, 7, 9, 11); 5 (1, 3, 5, 7, 9, 11); 6 (1 to 6); 35 (1, 3, 5, 7, 9, 11); 36 (1, 3, 5, 7, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11); 41 (1, 3, 5, 7, 9, 11); 42 (1, 3, 5, 7, 9, 11); 43 (1, 3, 5, 7, 9, 11); 44 (1, 3, 5, 7, 9, 11); 45 (1, 3, 5, 7, 9, 11); 46 (1, 3, 5, 7, 9, 11); 47 (1, 3, 5, 7, 9, 11); 48 (1, 3, 5, 7, 9, 11); 49 (1, 3, 5, 7, 9, 11); 51 (1, 3, 5, 7, 9, 11); 52 (1, 3, 5, 7, 9, 11); 53 (1, 4, 7, 9, 11); 54 (1 to 6); 55 (1 to 5); 56 (1-2, 3 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (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 : 31 (11-12); 35 (1, 3, 5, 7, 9, 11); 36 (1, 3, 5, 7, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11); 40 (1, 3, 5, 7, 9, 11); 41 (1, 3, 5, 7, 9, 11); 42 (1, 3, 5, 7-8, 9, 11); 43 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 44 (1-2, 7-8, 9-10, 11-12); 45 (1-2, 5-6, 7-8, 9-10, 11-12); 46 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 47 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 48 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 49 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 50 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 51 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 52 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 53 (1-3, 4-6, 7-8, 9-10, 11-12); 54 (1-6); 55 (1-4, 5-6); 56 (1-2, 3-6); 57 (1-6)
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