Scholars Portal
1955-2023
Preserved
2025-09-02
Preserved : 1 (1 to 12); 2 (, 1 to 12); 3 (, 1 to 12); 4 (, 1 to 12); 5 (, 1 to 12); 6 (, 1 to 12); 7 (, 1 to 12); 8 (, 1 to 12); 9 (, 1 to 8, 10 to 12); 10 (, 1 to 12); 11 (, 1 to 12); 12 (, 1 to 12); 13 (, 1 to 12); 14 (, 1 to 8, 9-10, 11, 12); 15 (, 1 to 12); 16 (, 1 to 6, 7-8, 9, 10, 11-12); 17 (, 1 to 12); 18 (, 1 to 12); 19 (, 1 to 12); 20 (, 1 to 12); 21 (, 1 to 12); 22 (, 1 to 12); 23 (, 1 to 12); 24 (, 1 to 12); 25 (, 1 to 12); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1 to 8, 9-10, 11, 12); 29 (, 1 to 12); 30 (, 1 to 15); 31 (, 1 to 15); 32 (, 1 to 18); 33 (, 1 to 17); 34 (, 1 to 18); 35 (, 1 to 18); 36 (, 1 to 18); 37 (, 1 to 18); 38 (, 1 to 18); 39 (, 1 to 18); 1955; 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
Internet Archive
1985-2006
Preserved
2025-08-08
1 to 22
LOCKSS Archive
1987-2012
Preserved
2026-02-09
3, 10, 21, 25, 28
CLOCKSS Archive
2010-2014
Preserved
2026-02-09
26 to 30
CLOCKSS Archive
2015-2015
In Progress
2026-02-09
31
Portico
1985-2016
Preserved
2026-02-12
Preserved : 1985: 1(1-12), 1986: 2(1-12), 1987: 3(1-6, 8-12), 1988: 4(1-12), 1989: 5(1-12), 1990: 6(1-12), 1991: 7(1-12), 1992: 8(1-12), 1993: 9(1-8, 10-12), 1994: 10(1-12), 1995: 11(1-6, 8-12), 1996: 12(1-4, 6-11), 1997: 13(1-12), 1998: 14(1-12), 1999: 15(1-12), 2000: 16(1-12), 2001: 17(1-12), 2002: 18(1-12), 2003: 19(1-12), 2004: 20(1-12), 2005: 21(1-12), 2006: 22(1-12), 2007: 23(1-12), 2008: 24(1-12), 2009: 25(1-12), 2010: 26(1-12), 2011: 27(1-12), 2012: 28(1-12), 2013: 29(1-12), 2014: 30(1-15), 2015: 31(1-15), 2016: 32(1)
CLOCKSS Archive
1985-2025
In Progress
2026-02-09
1 to 41
LOCKSS Archive
1985-2025
In Progress
2026-02-09
1 to 18, 41
Portico
1985-2026
Preserved
2026-02-12
Preserved : 1985: 1(1-12), 1986: 2(1-12), 1987: 3(1-12), 1988: 4(1-12), 1989: 5(1-12), 1990: 6(1-12), 1991: 7(1-12), 1992: 8(1-12), 1993: 9(1-2, 4-8, 10-12), 1994: 10(1-12), 1995: 11(1-12), 1996: 12(1-12), 1997: 13(1-12), 1998: 14(1-12), 1999: 15(1-12), 2000: 16(1-12), 2001: 17(1-12), 2002: 18(1-12), 2003: 19(1-12), 2004: 20(1-12), 2005: 21(1-12), 2006: 22(1-12), 2007: 23(1-12), 2008: 24(1-12), 2009: 25(1-12), 2010: 26(1-12), 2011: 27(1-12), 2012: 28(1-12), 2013: 29(1-12), 2014: 30(1-15), 2015: 31(1-15), 2016: 32(1-18), 2017: 33(1-18), 2018: 34(1-18), 2019: 35(1-18), 2020: 36(1-18), 2021: 37(1-8, 10-18), 2022: 38(1-18), 2023: 39(1-18), 2024: 40(1-18), 2025: 41(1-18), 2026: 42(1-3)
LOCKSS Archive
2003-2024
Preserved
2026-02-09
19 to 40
CLOCKSS Archive
1985-2023
Preserved
2026-02-09
ahead-of-print to 39
LOCKSS Archive
1985-2023
Preserved
2026-02-09
1 to 39
Portico
1987-2023
Preserved
2026-02-12
Preserved : 1987: 3(1-12), 1988: 4(1-12), 1989: 5(1-12), 1990: 6(1-12), 1991: 7(1-12), 1992: 8(1-12), 1993: 9(1-12), 1994: 10(1-12), 1995: 11(1-12), 1996: 12(1-12), 1997: 13(1-12), 1998: 14(1-8, 11-12), 1999: 15(1-12), 2000: 16(1-6, 9-10), 2001: 17(1-12), 2002: 18(1-12), 2003: 19(1-12), 2004: 20(1-12), 2005: 21(1-12), 2006: 22(1-12), 2007: 23(1-12), 2008: 24(1-12), 2009: 25(1-12), 2010: 26(1-12), 2011: 27(1-12), 2012: 28(1-12), 2013: 29(1-12), 2014: 30(1-15), 2015: 31(1-15), 2016: 32(1-18), 2017: 33(1-18), 2018: 34(1-18), 2019: 35(1-18), 2020: 36(1-18), 2021: 37(1-18), 2022: 38(1-18), 2023: 39(1-18)
National Digital Preservation Program, China
2006-2022
Preserved
2025-12-04
Preserved : ; 3 (1 to 9, 11 to 15); 22 (1 to 9, 11, 12); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11, 12); 27 (1 to 9, 11, 12); 28 (1 to 8, 9-1, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11 to 15); 32 (1 to 9, 11 to 18); 33 (1 to 9, 11 to 18); 34 (1 to 9, 11 to 18); 35 (1 to 9, 11 to 18); 36 (1 to 9, 11 to 16, 18); 37 (1 to 9, 11 to 18); 38 (1 to 9, 11 to 18)
Library of Congress
2010-2024
Preserved
2025-04-07
26 (1 to 12); 27 (1 to 12); 28 (1 to 9-10, 11, 12); 29 (1 to 12); 30 (1 to 15); 31 (1 to 15); 32 (1 to 18); 33 (1 to 18); 34 (1 to 18); 35 (1 to 18); 36 (1 to 18); 37 (1 to 18); 38 (1 to 18); 39 (1 to 18); 40 (1 to 12)