Scholars Portal
1965-2025
Preserved
2025-09-02
Preserved : 1 (1 to 3); 2 (, 1 to 3); 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 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (, 1 to 4); 17 (, 3); 20 (, 1); 21 (, 1 to 4); 22 (, 1 to 4); 23 (, 1 to 4); 24 (, 1); 25 (, 1 to 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 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 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, 2/3, 4 to 6); 47 (, 1, 2/3, 4 to 6); 48 (, 1, 2/3, 4 to 6); 49 (, 1, 2-3, 5, 6); 50 (, 1, 2, 3-4, 5 to 8); 51 (, 1 to 8); 52 (, 1 to 9); 53 (, 1 to 3, 4-5, 6 to 9); 54 (, 1 to 3, 4-5, 6 to 9); 55 (, 1 to 3, 4-5, 6 to 9); 56 (, 1, 3, 4-5, 6 to 9); 57 (, 1 to 9); 58 (, 1 to 9); 59 (, 1 to 9); 60 (, 1 to 9); 61 (, 2 to 9); 62 (, 1 to 6); 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1981; 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
Internet Archive
1965-2014
Preserved
2025-08-08
1 to 51
LOCKSS Archive
1965-2024
Preserved
2026-02-09
1 to 61
CLOCKSS Archive
2008-2017
Preserved
2026-02-09
45 to 54
LOCKSS Archive
2025-2025
In Progress
2026-02-09
62
Portico
1966-2026
Preserved
2026-02-12
Preserved : 1966: 2(1-3), 1967: 3(1-3), 1968: 4(1-3), 1969: 5(1-3), 1970: 6(1-3), 1971: 7(1-3), 1972: 8(1-3), 1973: 9(1-3), 1974: 10(1-3), 1975: 11(1-3), 1976: 12(1-3), 1977: 13(1-3), 1978: 14(1-3), 1979: 15(1-3), 1980: 16(1-3), 1981: 17(1-3), 1982: 18(1-3), 1983: 19(1-3), 1984: 20(1-3), 1985: 21(1-3), 1986: 22(1-3), 1987: 23(1-3), 1988: 24(1), 1988: 25(1-4), 1989: 26(1-4), 1990: 27(1-4), 1991: 28(1-4), 1992: 29(1-4), 1993: 30(1-4), 1994: 31(1-4), 1995: 32(1-4), 1996: 33(1-4), 1997: 34(1-4), 1998: 35(1-4), 1999: 36(1-4), 2000: 37(1-4), 2001: 38(1-4), 2002: 39(1-4), 2003: 40(1-4), 2004: 41(1-4), 2005: 42(1-4), 2006: 43(1-4), 2007: 44(1-4), 2008: 45(1-4), 2009: 46(1-6), 2010: 47(1-6), 2011: 48(1-6), 2012: 49(1-6), 2013: 50(1-8), 2014: 51(1-8), 2015: 52(1-9), 2016: 53(1-9), 2017: 54(1-9), 2018: 55(1-9), 2019: 56(1-9), 2020: 57(1-9), 2021: 58(1-9), 2022: 59(1-9), 2023: 60(1-9), 2024: 61(1-9), 2025: 62(1-9), 2026: 63(1)
CLOCKSS Archive
1965-2025
Preserved
2026-02-09
ahead-of-print to 62
National Library of the Netherlands
1965-2008
Preserved
2024-12-15
Preserved : 1 (1-3); 2 (1, 2); 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 (1-4); 13 (1-4); 14 (1-4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1); 25 (2-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-4); 45 (1-4)
National Digital Preservation Program, China
1997-2025
Preserved
2025-12-04
Preserved : 4 (1 to 4); 5 (1, 2, 3-4, 5 to 8); 6 (1 to 9); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (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, 2-3, 4 to 6); 47 (1, 2-3, 4 to 6); 48 (1, 2-3, 4 to 6); 49 (1, 2-3, 4 to 6); 51 (1 to 8); 52 (1 to 9); 53 (1 to 3, 4-5, 6 to 9); 54 (1 to 3, 4-5, 6 to 9); 55 (1 to 3, 4-5, 6 to 9); 56 (1 to 3, 4-5, 6 to 9); 57 (1 to 9); 58 (1 to 9); 59 (1 to 9); 61 (1 to 9); 62 (1 to 3)
Library of Congress
2010-2024
Preserved
2025-04-07
47 (1, 2-3, 4 to 6); 48 (1, 2-3, 4 to 6); 49 (1, 2-3, 4 to 6); 50 (1 to 3-4, 5 to 8); 51 (1 to 8); 52 (1 to 9); 53 (1 to 4-5, 6 to 9); 54 (1 to 4-5, 6 to 9); 55 (1 to 4-5, 6 to 9); 56 (1, 2, 4-5, 7 to 9); 57 (1 to 9); 58 (1 to 9); 59 (1 to 9); 60 (1 to 9); 61 (1 to 8)