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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 (, 1-4); 3 (, 1-2, 3-4); 4 (, 1, 2-3, 4); 5 (, 1 to 4); 6 (, 1 to 4); 7 (, 1, 2, 3-4); 8 (, 1, 2, 3-4); 9 (, 1-2, 3, 4); 10 (, 1, 2-3, 4); 11 (, 1 to 4); 12 (, 1 to 4); 13 (, 1 to 4); 14 (, 1, 2, 3-4); 15 (, 1 to 4); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 4); 19 (, 1 to 4); 20 (, 1 to 4); 21 (, 1 to 4); 22 (, 1 to 3); 23 (, 1 to 3); 24 (, 1 to 3); 25 (, 1 to 3); 26 (, 1 to 3); 27 (, 1 to 3); 28 (, 1 to 3); 29 (, 1 to 3); 30 (, 1 to 3); 31 (, 1 to 3); 32 (, 1-2, 3); 33 (, 1 to 3); 34 (, 1-2, 3); 35 (, 1-2, 3); 36 (, 1, 2-3); 37 (, 1-3); 38 (, 1-2, 3); 39 (, 1-3); 40 (, 1, 2); 41 (, 1-2); 42 (, 1-2); 43 (, 1-2); 44 (, 1, 2); 45 (, 1-2); 46 (, 1, 2); 47 (, 1-2); 48 (, 1-2); 49 (, 1, 2); 50 (, 1-2); 51 (, 1, 2); 52 (, 1, 2); 53 (, 1-2); 54 (, 1, 2); 55 (, 1, 2); 56 (, 1, 2); 57 (, 1, 2); 58 (, 1, 2); 59 (, 1, 2); 60 (, 1, 2); 61 (, 1-2); 62 (, 1, 2); 63 (, 1, 2); 64 (, 1, 2); 65 (, 1, 2); 66 (, 1, 2); 67 (, 1, 2); 68 (, 1, 2); 69 (, 1, 2); 70 (, 1, 2); 71 (, 1, 2); 72 (, 1, 2); 73 (, 1, 2); 74 (, 1, 2); 75 (, 1, 2); 76 (, 1, 2); 77 (, 1, 2); 78 (, 1, 2); 79 (, 1, 2); 80 (, 1, 2); 81 (, 1, 2); 82 (, 1, 2); 83 (, 1, 2); 84 (, 1, 2); 85 (, 1, 2); 86 (, 1, 2); 87 (, 1, 2); 88 (, 1, 2); 89 (, 1, 2); 90 (, 1, 2); 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 49
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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 1(3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 42, 44 to 91
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Portico
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Preserved
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2026-02-12
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Preserved : 1975: 6(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1976: 7(3-4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1981: 12(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1983: 14(2), 1984: 15(1, 4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 18(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1992: 25(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1993: 27(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 33(3), 1997: 34(1-3), 1997: 35(1-3), 1998: 36(1-3), 1998: 37(1-3), 1999: 38(1-3), 2000: 39(1-3), 2000: 40(1-2), 2000: 41(1-2), 2001: 42(1-2), 2002: 43(1-2), 2002: 44(1-2), 2002: 45(1-2), 2003: 46(1-2), 2003: 47(1-2), 2004: 48(1-2), 2004: 49(1-2), 2005: 50(1-2), 2005: 51(1-2), 2006: 52(1-2), 2006: 53(1-2), 2007: 54(1-2), 2007: 55(1-2), 2008: 56(1-2), 2008: 57(1-2), 2009: 58(1-2), 2009: 59(1-2), 2010: 60(1-2), 2010: 61(1-2), 2011: 62(1-2), 2011: 63(1-2), 2012: 64(1-2), 2013: 66(1-2), 2013: 67(1), 2014: 68(1-2), 2014: 69(2), 2015: 70(2), 2015: 71(1-2), 2016: 72(1-2), 2016: 73(1-2), 2017: 74(1-2), 2017: 75(1-2), 2018: 76(1-2), 2018: 77(1-2), 2019: 78(1-2), 2018/2019: 79(1-2), 2019: 80(1-2), 2020: 81(1-2), 2021: 82(1-2), 2021: 83(1-2), 2022: 84(1-2), 2022: 85(1-2), 2023: 86(1-2), 2023: 87(1-2), 2024: 88(1-2), 2024: 89(1-2), 2025: 90(2), 2025: 91(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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64, 65, 78
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LOCKSS Archive
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Preserved
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2026-02-09
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66 to 77, 79
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Library of Congress
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Preserved
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2025-04-07
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76 (1, 2); 77 (1, 2); 78 (1, 2); 79 (1, 2); 80 (1, 2); 81 (1, 2); 82 (1, 2); 83 (1, 2); 84 (1, 2); 85 (1, 2); 86 (1, 2); 87 (1, 2); 88 (1, 2); 89 (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, 2); 5 (1); 6 (2); 7 (1, 2); 8 (1, 2); 34 (1, 3); 35 (1, 3); 36 (1, 2); 37 (1); 38 (3); 39 (1); 41; 42; 43; 44 (2); 45 (1); 46 (2); 47 (1); 48; 49 (2); 51 (1, 2); 52 (1, 2); 53 (1); 54; 55 (2); 56 (1, 2); 57 (1, 2); 58 (1, 2); 59 (1, 2); 61 (1); 62 (2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1, 2); 71 (1, 2); 72 (1, 2); 73 (1, 2); 74 (1, 2); 75 (1, 2); 76 (1, 2); 77 (1, 2); 78 (1, 2); 79 (1, 2); 81 (1, 2); 82 (1, 2); 83 (1, 2); 84 (1, 2); 85 (1, 2); 86 (1, 2); 87 (1, 2); 88 (1, 2); 89 (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 : 4 (1, 2); 5 (1); 6 (2); 7 (1, 2); 8 (1, 2); 34 (1, 3); 35 (1, 3); 36 (1, 2); 37 (1); 38 (3); 39 (1); 41; 42; 43; 44 (2); 45 (1); 46 (2); 47 (1); 48; 49 (2); 51 (1, 2); 52 (1, 2); 53 (1); 54; 55 (2); 56 (1, 2); 57 (1, 2); 58 (1, 2); 59 (1, 2); 61 (1); 62 (2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1, 2); 71 (1, 2); 72 (1, 2); 73 (1, 2); 74 (1, 2); 75 (1, 2); 76 (1, 2); 77 (1, 2); 78 (1, 2); 79 (1, 2); 81 (1, 2); 82 (1, 2); 83 (1, 2); 84 (1, 2); 85 (1, 2); 86 (1, 2); 87 (1, 2); 88 (1, 2); 89 (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 : 34 (1, 3); 35 (1, 3); 36 (1, 2); 37 (1); 38 (3); 39 (1); 40 (2); 41 (1); 42; 43; 44 (2); 45 (1); 46 (2); 47 (1); 48; 49 (2); 50 (1-2); 51 (2); 52 (1); 53; 54 (2); 55 (1, 2); 56 (1, 2); 57 (1, 2); 58 (1, 2); 59 (1, 2); 60 (1); 61; 62 (2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1, 2); 70 (1, 2); 71 (1, 2); 72 (1, 2); 73 (1, 2); 74 (1, 2); 75 (1, 2); 76 (1, 2); 77; 78 (1, 2); 79 (1, 2)
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