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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 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 12); 42 (, 1 to 12); 43 (, 1 to 6, 7-8, 9 to 12); 44 (, 1 to 12); 45 (, 1 to 12); 46 (, 1-2, 3 to 12); 47 (, 1 to 12); 48 (, 1 to 12); 49 (, 1 to 12); 50 (, 1 to 12); 51 (, 1 to 12); 52 (, 1 to 12); 53 (, 1 to 12); 54 (, 1 to 12); 55 (, 1 to 12); 56 (, 1 to 12); 57 (, 1 to 12); 58 (, 1 to 12); 59 (, 1 to 12); 60 (, 1 to 12); 61 (, 1 to 12); 62 (, 1 to 12); 63 (, 1 to 12); 64 (, 1 to 12); 65 (, 1 to 12); 66 (, 1 to 12); 67 (, 1 to 12); 68 (, 1 to 12); 69 (, 1 to 12); 70 (, 1 to 12); 71 (, 1 to 12); 72 (, 1 to 12); 73 (, 1 to 12); 74 (, 1 to 12); 75 (, 1 to 12); 76 (, 1 to 10); 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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19 to 29
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LOCKSS Archive
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In Progress
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2026-02-09
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Portico
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Preserved
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2026-02-12
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Preserved : 1967: 19(1-6), 1968: 20(1-6), 1969: 21(1-6), 1970: 22(1-6), 1971: 23(1-6), 1972: 24(1-6), 1973: 25(1-6), 1974: 26(1-6), 1975: 27(1-6), 1976: 28(1-6), 1977: 29(1-6), 1978: 30(1-6), 1979: 31(1-6), 1980: 32(1-6), 1981: 33(1-6), 1982: 34(1-6), 1983: 35(1-6), 1984: 36(1-6), 1985: 37(1-6), 1986: 38(1-6), 1987: 39(1-6), 1988: 40(1-6), 1989: 41(1-12), 1990: 42(1-12), 1991: 43(1-12), 1992: 44(1-12), 1993: 45(1-12), 1994: 46(1-12), 1995: 47(1-12), 1996: 48(1-12), 1997: 49(1-12), 1998: 50(1-12), 1999: 51(1-12), 2000: 52(1-12), 2001: 53(1-12), 2002: 54(1-12), 2003: 55(1-12), 2004: 56(1-12), 2005: 57(1-12), 2006: 58(1-12), 2007: 59(1-12), 2008: 60(1-12), 2009: 61(1-12), 2010/2011: 62(1-12), 2011/2012: 63(1-12), 2012/2013: 64(1-2, 5-12), 2013/2014: 65(1-2, 4-12), 2014/2015: 66(1-6, 8-12), 2015/2016: 67(1-12), 2016/2017: 68(1-12), 2017/2018: 69(1-12), 2018/2019: 70(1-12), 2019/2020: 71(1-12), 2020/2021: 72(1-12), 2021/2022: 73(1-12), 2022/2023: 74(1-6, 8-12), 2023/2024: 75(1-12), 2024/2025: 76(1-5, 7-12), 2025: 77(1-8)
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CLOCKSS Archive
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Preserved
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2026-02-09
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19 to 77
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Library of Congress
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Preserved
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2025-04-07
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68 (11); 69 (9 to 12); 70 (1 to 12); 71 (1 to 12); 72 (1 to 12); 73 (1 to 12); 74 (1 to 12); 75 (1 to 12); 76 (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 to 9, 11, 12); 6 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 7)
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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 to 9, 11, 12); 6 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 7)
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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 : 7 (1 to 9, 11, 12); 63 (1, 8, 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (1 to 9, 11, 12); 76 (1 to 7)
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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 : 7 (1 to 9, 11, 12); 63 (1, 8, 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (1 to 9, 11, 12); 76 (1 to 7)
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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 : 49 (3, 6, 7, 9, 12); 52 (7-12); 53 (1-12); 54 (1-12); 55 (1-12); 56 (1-12); 57 (1-12); 58 (1-4, 6-12); 59 (4, 6-12); 60 (1-12); 61 (1, 2, 4, 6-12); 62 (1-12); 63 (1-10, 12); 64 (1-12); 65 (1-12); 66 (1-12); 67 (1-12); 68 (1-12); 69 (1-12); 70 (1-12); 71 (1)
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