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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 15 (1); 16 (, 1); 17 (, 1); 18 (, 1); 19 (, 1); 20 (, 1); 21 (, 1); 22 (, 1 to 4); 23 (, 1 to 4); 29 (, 1 to 4); 30 (, 1 to 4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1, 2, 3-4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1, 2, 3-4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 4); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 5); 48 (, 1 to 5); 49 (, 1 to 5); 50 (, 1 to 5); 51 (, 1 to 5); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1, 2, 5, 6); 57 (, 1 to 6); 58 (, 1 to 6); 59 (, 1 to 4, 6); 60 (, 1, 2, 4 to 6); 61 (, 1 to 6); 62 (, 2 to 6); 63 (, 1 to 7); 64 (, 1 to 7); 65 (, 1 to 7); 66 (, 1 to 7); 67 (, 1 to 7); 68 (, 1 to 7); 69 (, 1 to 5); 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 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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25 to 32
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LOCKSS Archive
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Preserved
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2026-02-09
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15 to 68
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CLOCKSS Archive
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Preserved
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2026-02-09
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ahead-of-print, 15 to 69
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LOCKSS Archive
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In Progress
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2026-02-09
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69
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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 15(1), 1972: 16(1), 1973: 17(1), 1974: 18(1), 1975: 19(1), 1976: 20(1), 1977: 21(1), 1978: 22(1), 1979: 23(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 24(1), 1981: 25(1), 1982: 26(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1983: 27(1), 1984: 28(1), 1985: 29(1-4), 1986: 30(1-4), 1987: 31(1-4), 1988: 32(1-4), 1989: 33(1-4), 1990: 34(1-4), 1991: 35(1-4), 1992: 36(1-4), 1993: 37(1-4), 1994: 38(1-4), 1995: 39(1-4), 1996: 40(1-4), 1997: 41(1-4), 1998: 42(1-4), 1999: 43(1-4), 2000: 44(1-4), 2001: 45(1-4), 2002: 46(1-4), 2003: 47(1-4), 2004: 48(1-5), 2005: 49(1-5), 2006: 50(1-5), 2007: 51(1-5), 2008: 52(1-6), 2009: 53(1-6), 2010: 54(1-6), 2011: 55(1-6), 2012: 56(1-6), 2013: 57(1-6), 2014: 58(1-6), 2015: 59(1-6), 2016: 60(1-6), 2017: 61(1-6), 2018: 62(1-6), 2019: 63(1-7), 2020: 64(1-7), 2021: 65(1-7), 2022: 66(1-7), 2023: 67(1-7), 2024: 68(1-7), 2025: 69(1-7), 2026: 70(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 : 5 (1 to 5); 6 (1 to 6); 41 (1, 2, 3-4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 6); 53 (1 to 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 7); 64 (1 to 7); 65 (1 to 7); 66 (1 to 7); 67 (1 to 7); 68 (1 to 7); 69 (1, 2)
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Library of Congress
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Preserved
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2025-04-07
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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 7); 64 (1 to 7); 65 (1 to 7); 66 (1 to 7); 67 (1 to 7); 68 (1 to 7)
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