Scholars Portal
1981-2025
Preserved
2025-09-02
Preserved : 2 (1 to 4); 3 (, 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 6); 12 (, 1 to 7); 13 (, 1 to 7); 14 (, 1 to 7); 15 (, 1 to 7); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 19 (, 1 to 6); 20 (, 1 to 7); 21 (, 1 to 8); 22 (, 1 to 8); 23 (, 1 to 8); 24 (, 1 to 8); 25 (, 1 to 8); 26 (, 1 to 8); 27 (, 1 to 8); 28 (, 1 to 8); 29 (, 1 to 8); 30 (, 1 to 8); 31 (, 1, 2/3, 4 to 8); 32 (, 1 to 8); 33 (, 1, 2, 5 to 7); 34 (, 1 to 8); 35 (, 1 to 8); 36 (, 1 to 8); 37 (, 1 to 8); 38 (, 1 to 9); 39 (, 1 to 10); 40 (, 1 to 8, 9-10); 41 (, 1 to 9); 42 (, 1 to 9); 43 (, 1 to 9); 44 (, 1 to 9); 45 (, 1 to 9); 46 (, 1 to 6); 1981; 1982; 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
Portico
1981-1982
Preserved
2026-02-12
Preserved : 1981: 2(1-4), 1982: 3(1-4)
Portico
1984-2026
Preserved
2026-02-12
Preserved : 1984: 5(1-4), 1985: 6(1-4), 1986: 7(1-4), 1987: 8(1-4), 1988: 9(1-4), 1989: 10(1-4), 1990: 11(1-6), 1991: 12(1-7), 1992: 13(1-7), 1993: 14(1-7), 1994: 15(1-7), 1995: 16(1, S 1, 2-6), 1996: 17(1, S 1, 2-6), 1997: 18(1, S 1, 2-6), 1998: 19(1, S 1, 2-6), 1999: 20(1-7), 2000: 21(1-8), 2001: 22(1-8), 2002: 23(1-8), 2003: 24(1-8), 2004: 25(1-8), 2005: 26(1-8), 2006: 27(1-8), 2007: 28(1-8), 2008: 29(1-8), 2009: 30(1-8), 2010: 31(1-8), 2011: 32(1-8), 2012: 33(1-8), 2013: 34(1, S 1, 2-8), 2014: 35(1, S 1, 2-8), 2015: 36(1, S 1, 2-8), 2016: 37(1, S1, 2-8), 2017: 38(1-9), 2018: 39(1-10), 2019: 40(1-10), 2020: 41(1-9), 2021: 42(1-9), 2022: 43(1-9), 2023: 44(1-9), 2024: 45(1-9), 2025: 46(1-9), 2026: 47(1)
CLOCKSS Archive
1987-2026
Preserved
2026-02-09
8, 12 to 47
Technische Informationsbibliothek
1997-2021
Preserved
2026-01-13
vol.18:1-6,S1;vol.19:1-6,S1;vol.20:1-7;vol.21:1-8;vol.22:1-8;vol.23:1-8;vol.24:1-8;vol.25:1-8;vol.26:1-8;vol.27:1-8;vol.28:1-8;vol.29:1-8;vol.30:1-8;vol.31:1-1,4-8,2-3;vol.32:1-8;vol.33:1-8;vol.34:1-8,S1;vol.35:1-8,S1;vol.36:1-8,S1;vol.37:1-8,sup.S1;vol.38:1-9;vol.39:1-10;vol.40:1-8,9-10;vol.41:1-9;vol.42:1
National Digital Preservation Program, China
1996-2022
Preserved
2025-10-23
Preserved : 2 (1 to 7); 3 (1 to 8); 4 (1 to 8, 9-1); 17 (S1, 1 to 6); 18 (S1, 1 to 6); 19 (S1, 1 to 6); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 8); 26 (1 to 8); 27 (1 to 8); 28 (1 to 8); 29 (1 to 8); 31 (1, 2‐3, 4 to 8); 32 (1 to 8); 33 (1 to 8); 34 (S1, 1 to 8); 35 (S1, 1 to 8); 36 (S1, 1 to 8); 37 (S1, 1 to 8); 38 (1 to 9); 39 (1 to 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 9)
National Digital Preservation Program, China
1996-2022
Preserved
2025-12-04
Preserved : 2 (1 to 7); 3 (1 to 8); 4 (1 to 8, 9-1); 17 (S1, 1 to 6); 18 (S1, 1 to 6); 19 (S1, 1 to 6); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 8); 26 (1 to 8); 27 (1 to 8); 28 (1 to 8); 29 (1 to 8); 31 (1, 2‐3, 4 to 8); 32 (1 to 8); 33 (1 to 8); 34 (S1, 1 to 8); 35 (S1, 1 to 8); 36 (S1, 1 to 8); 37 (S1, 1 to 8); 38 (1 to 9); 39 (1 to 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 9)