Scholars Portal
1985-2025
Preserved
2025-09-02
Preserved : 6 (1, 2); 7 (, 1, 2); 8 (, 1, 2); 9 (, 1, 2); 10 (, 1, 2); 11 (, 1, 2); 12 (, 1, 2); 13 (, 1 to 4); 14 (, 1 to 3); 15 (, 1 to 3); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 3); 19 (, 1 to 4); 20 (, 1 to 4); 21 (, 1 to 3); 22 (, 1 to 4); 23 (, 1 to 4); 24 (, 1 to 4); 25 (, 1 to 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1, 2, 3-4); 29 (, 1-2, 3-4); 30 (, 1-2, 3-4); 31 (, 1-2, 3-4); 32 (, 1 to 3); 33 (, 3, 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 2 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1-2, 3, 4); 43 (, 1 to 4); 44 (, 1 to 4); 45 (, 1 to 4); 46 (, 1 to 3); 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
LOCKSS Archive
1980-2024
Preserved
2026-02-09
1 to 45
CLOCKSS Archive
1980-2025
Preserved
2026-02-09
ahead-of-print to 46
LOCKSS Archive
2025-2025
In Progress
2026-02-09
46
Portico
1991-2000
Preserved
2026-02-12
Preserved : 1991: 12(1-2), 1992: 13(1-4), 1993: 14(1-3), 1994: 15(1-3), 1995: 16(1-4), 1996: 17(1-4), 1997: 18(1-3), 1998: 19(1-4), 1999: 20(1-4), 2000: 21(1-3)
Portico
2001-2009
Preserved
2026-02-12
Preserved : 2001: 22(1-4), 2002: 23(1-4), 2003: 24(1-4), 2004: 25(1-4), 2005: 26(1-4), 2006: 27(1-4), 2007/2009: 28(1-4)
Portico
2011-2025
Preserved
2026-02-12
Preserved : 2011: 32(1-4), 2012: 33(1-4), 2013: 34(1-4), 2014: 35(1-4), 2015: 36(1-4), 2016: 37(1-4), 2017: 38(1-4), 2018: 39(1-4), 2019: 40(1-4), 2020: 41(1-4), 2021: 42(1-4), 2022: 43(1-4), 2023: 44(1-4), 2024: 45(1-4), 2025: 46(1-4)
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : 2 (1 to 4); 3 (1-2, 3-4); 4 (1 to 4); 18 (sup1, 1 to 3); 19 (1 to 4); 21 (sup1, 1 to 3); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (sup1, 1 to 4); 27 (1 to 4); 28 (1, 2, 3-4); 29 (1-2, 3-4); 31 (1-2, 3-4); 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); 41 (1 to 4); 42 (1-2, 3, 4); 43 (1 to 4); 44 (1 to 3); 45 (1 to 4)
Library of Congress
2010-2024
Preserved
2025-04-07
29 (3-4); 30 (1-2, 3-4); 31 (1-2, 3-4); 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 (1-2, 3, 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 3)