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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 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 7 (, 1 to 4); 8 (, 1 to 4); 9 (, 1 to 4); 10 (, 1 to 4); 11 (, 1 to 4); 12 (, 1 to 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (, 1 to 4); 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 8); 37 (, 1 to 8); 38 (, 1 to 8); 39 (, 1 to 8); 40 (, 1 to 8); 41 (, 1 to 8); 42 (, 1 to 8); 43 (, 1 to 8); 44 (, 1 to 8); 45 (, 1 to 8); 46 (, 1 to 8); 47 (, 1 to 12); 48 (, 1 to 12); 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
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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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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 39
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 48
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Portico
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Preserved
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2026-02-12
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Preserved : 1976: 4(1, 4), 1977: 5(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 8(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1986: 14(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1988: 16(4), 1989: 17(3), 1990: 18(1), 1991: 19(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1993: 21(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1995: 23(6)
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Portico
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Preserved
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2026-02-12
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Preserved : 2000: 28(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 2003: 31(5)
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Portico
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Preserved
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2026-02-12
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Preserved : 2006: 34(1-2, 5-6), 2007: 35(2-4, 6), 2008: 36(1-8), 2009: 37(1-8), 2010: 38(1-8), 2011: 39(1-8), 2012: 40(3-6), 2013: 41(1-7), 2014: 42(1-7), 2015: 43(3-8), 2016: 44(1-8), 2017: 45(1-6, 8), 2018: 46(1-8), 2019: 47(1-12), 2019/2020: 48(1-12)
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Library of Congress
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Preserved
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2025-04-07
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45 (4, 8); 46 (1 to 8); 47 (1 to 12); 48 (1 to 12); 49 (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 8); 5 (1 to 9, 11, 12); 25 (1 to 6); 26 (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 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 8); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 8); 46 (1 to 8); 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)
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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 8); 5 (1 to 9, 11, 12); 25 (1 to 6); 26 (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 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 8); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 8); 46 (1 to 8); 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)
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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 (6); 25 (1-6); 26 (1-6); 27 (1-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-8); 37 (1-8); 38 (1-8); 39 (1, 3-8); 40 (1-8); 41 (1-8); 42 (1-8); 43 (1-8); 44 (1-8); 45 (1-8); 46 (1-8); 47 (1-5, 7-12)
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