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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, 2, 3/4); 2 (, 1/2, 3/4); 3 (, 1); 4 (, 1, 2); 5 (, 1 to 3); 6 (, 1); 7 (, 1 to 3); 8 (, 1 to 3); 9 (, 1); 10 (, 1 to 3); 11 (, 1, 2/3); 12 (, 1 to 3); 13 (, 1 to 3); 14 (, 1 to 3); 15 (, 1 to 3); 16 (, 1, 2/3); 17 (, 1 to 3); 18 (, 1 to 3); 19 (, 1 to 3); 20 (, 1, 2/3); 21 (, 1 to 3); 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 to 3); 33 (, 1 to 3); 34 (, 1 to 3); 35 (, 1 to 3); 36 (, 1 to 3); 37 (, 1 to 3); 38 (, 1 to 3); 39 (, 1 to 3); 40 (, 1 to 3); 41 (, 1 to 3); 42 (, 1 to 3); 43 (, 1 to 3); 44 (, 1 to 3); 45 (, 1 to 3); 46 (, 1 to 3); 47 (, 1 to 3); 48 (, 1); 49 (, 1); 1974; 1975; 1976; 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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13 to 20
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Portico
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Preserved
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2026-02-12
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Preserved : 1974: 1(1-4), 1975: 2(1-4)
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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 : 1976/1977: 3(2-4), 1978: 4(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 4(3-4), 1980: 5(1-2), 1981/1982: 6(1-3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1984: 8(2-3), 1985: 9(1-3), 1986: 10(1-3), 1987: 11(1), 1988: 12(1-2), 1989: 13(1, 3), 1990: 14(1-3), 1991: 15(1-3), 1992: 16(1-3), 1993: 17(2), 1994: 18(1, 3), 1995: 19(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 20(2-3), 1997: 21(1-3), 1998: 22(1-3), 1999: 23(1-3), 2000: 24(1-3), 2001: 25(1-3), 2002: 26(1-3), 2003: 27(1-3), 2004: 28(1-3), 2005: 29(1-3), 2006: 30(1-3), 2007: 31(1-3), 2008: 32(1-3), 2009: 33(1-3), 2010: 34(1-3), 2011: 35(1-3), 2012: 36(1-3), 2013: 37(1), 2014: 38(1-2), 2015: 39(1-3), 2016: 40(1-3), 2017: 41(1-3), 2018: 42(1-3), 2019: 43(1-3), 2020: 44(1-3), 2021: 45(1-3), 2022: 46(1-3), 2023: 47(1-3), 2024: 48(1), 2025: 49(1), 2026: 50(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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36
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LOCKSS Archive
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Preserved
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2026-02-09
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37 to 43
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Library of Congress
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Preserved
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2025-04-07
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42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1); 49 (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 : 3 (1 to 3); 4 (1 to 3); 21 (1 to 3); 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); 31 (1 to 3); 32 (1 to 3); 33 (1 to 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 37 (1 to 3); 38 (1 to 3); 39 (1 to 3); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1)
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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 3); 4 (1 to 3); 21 (1 to 3); 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); 31 (1 to 3); 32 (1 to 3); 33 (1 to 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 37 (1 to 3); 38 (1 to 3); 39 (1 to 3); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1)
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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 (1-3); 22 (1-3); 23 (1-3); 24 (1-3); 25 (1-3); 26 (1-3); 27 (1-3); 28 (1-3); 29 (1-3); 30 (1-3); 31 (1-3); 32 (1-3); 33 (1-3); 34 (1-3); 35 (1-3); 36 (1-3); 37 (1-3); 38 (1-3); 39 (1-3); 40 (1-3); 41 (1-3); 42 (1-3); 43 (1-3)
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