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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 to 4); 3 (, 1 to 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 7 (, 1 to 4); 8 (, 1 to 4); 9 (, 1 to 4); 10 (, 1 to 4); 11 (, 1 to 4); 12 (, 1 to 6); 13 (, 1 to 6); 14 (, 1 to 6); 15 (, 1 to 6); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 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 7, 9, 10); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1 to 12); 29 (, 1 to 12); 30 (, 1 to 12); 31 (, 1 to 12); 32 (, 1 to 12); 33 (, 1 to 12); 34 (, 1 to 12); 35 (, 1 to 12); 36 (, 1 to 12); 37 (, 1 to 18); 38 (, 1 to 18); 39 (, 1 to 18); 40 (, 1 to 18); 41 (, 1 to 18); 42 (, 1 to 24); 43 (, 1 to 24); 44 (, 1 to 17, 18-19, 20 to 24); 45 (, 1 to 17, 18-19, 20 to 24); 46 (, 1 to 24); 47 (, 1 to 24); 48 (, 1 to 24); 49 (, 1 to 24); 50 (, 1 to 24); 51 (, 1 to 22, 23-24); 52 (, 1 to 24); 53 (, 1 to 24); 54 (, 1 to 24); 55 (, 1 to 24); 56 (, 1-2, 3 to 24); 57 (, 1 to 14, 15-16, 17 to 24); 58 (, 1 to 24); 59 (, 1 to 24); 60 (, 1 to 24); 61 (, 1 to 24); 62 (, 1-2, 3 to 6, 9 to 24); 63 (, 1 to 16); 1961; 1963; 1964; 1965; 1966; 1967; 1968; 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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26 to 44
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 62
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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 to 63
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LOCKSS Archive
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In Progress
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2026-02-09
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63
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Portico
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Preserved
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2026-02-12
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Preserved : 1961: 1(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1963: 2(1-2), 1964: 3(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1965: 4(1-2), 1966: 5(1-2), 1967: 6(1-4), 1968: 7(1-4), 1970: 8(1-4), 1971: 9(1-4), 1972: 10(1-4), 1973: 11(1-4), 1974: 12(1-4), 1975: 13(1-4), 1976: 14(1-4), 1977: 15(1-4), 1978: 16(1-4), 1979: 17(1-4), 1980: 18(1-4), 1981: 19(1-4), 1982: 20(1-6), 1983: 21(1-6), 1984: 22(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1985: 23(1), 1986: 24(1), 1987: 25(1), 1988: 26(1-12), 1989: 27(1-12), 1990: 28(1-12), 1991: 29(1-12), 1992: 30(1-12), 1993: 31(1-12), 1994: 32(1-12), 1995: 33(1-12), 1996: 34(1-12), 1997: 35(1-12), 1998: 36(1-12), 1999: 37(1-18), 2000: 38(1-18), 2001: 39(1-18), 2002: 40(1-18), 2003: 41(1-18), 2004: 42(1-24), 2005: 43(1-24), 2006: 44(1-24), 2006/2007: 45(1-24), 2005/2006/2007/2008: 46(1-24), 2009: 47(1-24), 2010: 48(1-24), 2011: 49(1-24), 2012: 50(1-24), 2013: 51(1-24), 2014: 52(1-24), 2015: 53(1-24), 2016: 54(1-24), 2017: 55(1-24), 2018: 56(1-24), 2019: 57(1-24), 2020: 58(1-24), 2021: 59(1-24), 2022: 60(1-24), 2023: 61(1-24), 2024: 62(1-15, 17-22, 24), 2025: 63(1-24), 2026: 64(1-3)
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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 to 24, 27 to 39
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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 to 9, 11 to 18); 5 (1 to 9, 11 to 19, 21 to 24); 6 (1 to 9, 11 to 19, 21 to 24); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11 to 18); 38 (1 to 9, 11 to 18); 39 (1 to 9, 11 to 18); 41 (1 to 9, 11 to 18); 42 (1 to 9, 11 to 19, 21 to 24); 43 (1 to 9, 11 to 19, 21 to 24); 44 (1 to 9, 11 to 17, 18-19, 21 to 24); 45 (1 to 9, 11 to 17, 18-19, 21 to 24); 46 (1 to 9, 11 to 19, 21 to 24); 47 (1 to 9, 11 to 19, 21 to 24); 48 (1 to 9, 11 to 19, 21 to 24); 49 (1 to 9, 11 to 19, 21 to 24); 51 (1 to 9, 11 to 19, 21, 22, 23-24); 52 (1 to 9, 11 to 19, 21 to 24); 53 (1 to 9, 11 to 19, 21 to 24); 54 (1 to 9, 11 to 19, 21 to 24); 55 (1 to 9, 11 to 19, 21 to 24); 56 (1-2, 2 to 9, 11 to 19, 21 to 24); 57 (1 to 9, 11 to 14, 15-16, 17 to 19, 21 to 24); 58 (1 to 9, 11 to 19, 21 to 24); 59 (1 to 9, 11 to 19, 21 to 24); 61 (1 to 9, 11 to 19, 21 to 24); 62 (1-2, 2 to 9, 11 to 19, 21 to 24); 63 (1 to 4, 8)
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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 : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-4); 7 (1-4); 8 (1-4); 9 (1-4); 10 (1-4); 11 (1-4); 12 (1-6); 13 (1-6); 14 (1-6); 15 (1-6); 16 (1-6); 17 (1-6); 18 (1-6); 19 (1-6); 20 (1-6); 21 (1-6); 22 (1-6); 23 (1-6); 24 (1-6); 25 (1-7, 9, 10); 26 (1-12); 27 (1-12); 28 (1-12); 29 (1-12); 30 (1-3, 5-12); 31 (1-12); 32 (1-12); 33 (1-3, 5-12); 34 (1-12); 35 (1-12); 36 (1-12); 37 (1-18); 38 (1-18); 39 (1-18); 40 (1-18); 41 (1-18); 42 (1-24); 43 (1-24); 44 (1-5, 7, 9-17, 18-19, 20-24); 45 (1-17, 18-19, 20-24); 46 (1-24)
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Library of Congress
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Preserved
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2025-04-07
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48 (18); 49 (4, 8); 50 (12); 53 (18); 54 (8); 55 (2, 5 to 24); 56 (1-2, 3 to 24); 57 (1 to 15-16, 17 to 24); 58 (1 to 24); 59 (1 to 24); 60 (1 to 24); 61 (1 to 24); 62 (1-2, 3 to 24); 63 (4)
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