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Internet Archive
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Preserved
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2025-08-08
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9 to 10
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 4 (1); 5 (, 1); 6 (, 1); 7 (, 1); 8 (, 1); 9 (, 1); 10 (, 1); 11 (, 1 to 6); 12 (, 1, 2-3, 4-5, 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 8); 22 (, 1 to 8); 23 (, 1 to 8); 24 (, 1 to 8); 25 (, 1 to 8); 26 (, 1 to 8); 27 (, 1 to 8); 28 (, 1 to 8); 29 (, 1 to 8); 30 (, 1 to 8); 31 (, 1 to 8); 32 (, 1 to 8); 33 (, 1 to 8); 34 (, 1 to 8); 35 (, 1 to 8); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 3); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 3); 45 (, 1, 2-3, 4); 46 (, 1 to 4); 47 (, 1 to 4); 48 (, 1 to 6); 49 (, 1 to 5); 1980; 1981; 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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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 50
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 4(1), 1981: 5(1), 1983: 6(1), 1983: 7(1), 1984: 8(1), 1985: 9(1), 1986: 10(1), 1987: 11(1-6), 1988: 12(1-6), 1989: 13(1-6), 1990: 14(1-6), 1991: 15(1-6), 1992: 16(1-6), 1993: 17(1-6), 1994: 18(1-6), 1995: 19(1-6), 1996: 20(1-6), 1997: 21(1-8), 1998: 22(1-8), 1999: 23(1-8), 2000: 24(1-8), 2001: 25(1-8), 2002: 26(1-8), 2003: 27(1, S 1, 2-8), 2004: 28(1, S 1, 2-8), 2005: 29(1, S 1, 2, S 2, 3-8), 2006: 30(1, S 1, 2-8), 2007: 31(1, S 1, 2-8), 2008: 32(1, S 1, 2-8), 2009: 33(1, S 1, 2-8), 2010: 34(1-8), 2011: 35(1-8), 2012: 36(1-4), 2013: 37(1-4), 2014: 38(1-4), 2015: 39(1-4), 2016: 40(1-4), 2017: 41(1-4), 2018: 42(1-4), 2019: 43(1-4), 2020: 44(1-4), 2021: 45(1-4), 2022: 46(1-4), 2023: 47(1-4), 2024: 48(1-6), 2025: 49(1-6), 2025/2026: 50(1-2)
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LOCKSS Archive
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In Progress
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2026-02-09
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36, 43
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LOCKSS Archive
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Preserved
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2026-02-09
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37 to 42
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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 8); 4 (1 to 3); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 8); 26 (1 to 8); 27 (1 to 8); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (Suppl 1, 1 to 8); 34 (Suppl 1, 1 to 8); 35 (1 to 8); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1, 2, 3-4); 45 (1, 2-3, 4); 46 (1 to 4); 47 (1 to 4); 48 (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 8); 4 (1 to 3); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 8); 26 (1 to 8); 27 (1 to 8); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 8); 33 (Suppl 1, 1 to 8); 34 (Suppl 1, 1 to 8); 35 (1 to 8); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1, 2, 3-4); 45 (1, 2-3, 4); 46 (1 to 4); 47 (1 to 4); 48 (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 : 21 (2, 3, 5-8); 22 (1-8); 23 (1, 3, 4, 6-8); 24 (1-8); 25 (1-6, 8); 26 (1, 2, 4-7); 27 (Supplement?, 1-8); 28 (Supplement?, 1-4, 6-8); 29 (supplement-2, 1-8); 30 (1, 3-8); 31 (1-5, 7, 8); 32 (1-8); 33 (supplement-1, 1-8); 34 (supplement-1, 1-8); 35 (2-8); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1, 2, 3-4); 41 (1-4); 42 (1-4); 43 (1, 2); 58 (7)
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