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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 5); 2 (, 1 to 6); 3 (, 1 to 3, 4/5); 4 (, 1/2, 3 to 5); 5 (, 1, 2, 3/4, 5); 6 (, 1 to 5); 7 (, 1 to 5); 8 (, 1/2, 3 to 5); 9 (, 1 to 3, 4/5); 10 (, 1/2, 3-5); 11 (, 1, 2/3, 4); 12 (, 1 to 4); 13 (, 1, 2/3, 4); 14 (, 1 to 4); 15 (, 1 to 4); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 4); 19 (, 1 to 4); 20 (, 1, 2, 3/4); 21 (, 1 to 4); 22 (, 1/2, 3, 4); 23 (, 1 to 4); 24 (, 1 to 4); 25 (, 1, 2/3, 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1 to 4); 29 (, 1 to 4); 30 (, 1, 2, 3/4); 31 (, 1 to 4); 32 (, 1, 2, 3/4); 33 (, 1/3, 4); 34 (, 1/2, 3, 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 4); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 4); 48 (, 1, 2, 3/4); 49 (, 1 to 4); 50 (, 1, 2, 3/4); 51 (, 1 to 4); 52 (, 1 to 4); 53 (, 1, 2, 3/4, 5, 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 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 6); 64 (, 1 to 6); 65 (, 1 to 6); 66 (, 1 to 6); 67 (, 1 to 6); 68 (, 1 to 6); 69 (, 1 to 6); 70 (, 1 to 6); 71 (, 1 to 6); 72 (, 1 to 6); 73 (, 5, 6); 74 (, 1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (, 1 to 6); 78 (, 1 to 6); 79 (, 1); 1960; 1961; 1962; 1963; 1964; 1965; 1966; 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 48
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Portico
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Preserved
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2026-02-12
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Preserved : 1960/1961: 1(1-4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1963: 2(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1965: 2(4, 6), 1966: 3(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 50, 53 to 80
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Portico
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Preserved
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2026-02-12
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Preserved : 1976: 16(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1981: 25(2-3), 1982: 26(3), 1982: 27(4), 1983: 28(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1989: 39(4), 1989: 40(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1992: 43(4), 1993: 46(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 50(3-4), 1997: 51(1-4), 1998: 52(1-4), 1998/1999: 53(1-6), 1999/2000: 54(1-6), 2000/2001: 55(1-6), 2001/2002: 56(1-6), 2003: 57(1-6), 2003/2004: 58(1-6), 2004/2005: 59(1-6), 2006: 60(1-6), 2007: 61(1-6), 2008: 62(1-6), 2009: 63(1-6), 2010: 64(1-6), 2011: 65(1-6), 2012: 66(1-6), 2013: 67(1-4, 6), 2014: 68(1-6), 2015: 69(2-6), 2016: 70(1-6), 2017: 71(1-6), 2018: 72(1-6), 2019: 73(1-6), 2019/2020: 74(1-6), 2021: 75(1-6), 2022: 76(1-6), 2023: 77(1-6), 2024: 78(1-6), 2024: 79(1), 2025: 80(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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66, 73
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LOCKSS Archive
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Preserved
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2026-02-09
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67 to 72
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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 (3); 6 (1 to 6); 7 (1 to 6); 51 (1 to 4); 52 (1 to 4); 53 (1 to 3, 5, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (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 : 5 (3); 6 (1 to 6); 7 (1 to 6); 51 (1 to 4); 52 (1 to 4); 53 (1 to 3, 5, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (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 : 52 (1-4); 53 (1, 2, 3-4, 5, 6); 54 (1-6); 55 (1-6); 56 (1-6); 57 (1, 3-6); 58 (1-6); 59 (1-6); 60 (2-4); 61 (1, 2, 4-6); 62 (1-6); 63 (1-6); 64 (1-6); 65 (1-6); 66 (1-6); 67 (1-6); 68 (1-3, 5, 6); 69 (1-6); 70 (1-3, 5, 6); 71 (1-6); 72 (1-6); 73 (1-5)
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Library of Congress
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Preserved
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2025-04-07
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72 (2 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6)
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