Scholars Portal
1981-2026
Preserved
2026-03-19
Preserved : 1 (1 to 6); 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 5 (1 to 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (S1, 1 to 6); 18 (1 to 6); 19 (S1, 1 to 6); 20 (none); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 30 (1 to 8); 31 (1 to 8); 32 (1, 2, 6, 8 to 12); 33 (1 to 12); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (1 to 12); 38 (1 to 12); 39 (1 to 12); 40 (1 to 12); 41 (1 to 12); 42 (1 to 12); 43 (1 to 12); 44 (1 to 12); 45 (1 to 12); 46 (1 to 4)
Internet Archive
1981-2012
Preserved
2025-08-08
1 to 32
Technische Informationsbibliothek
1997-2021
Preserved
2026-01-13
vol.17:1-6,S1;vol.18:1-6;vol.19:1-6,S1;vol.20:1-6,S1;vol.21:1-6,S1;vol.22:1-6;vol.23:1-6;vol.24:1-6;vol.25:1-6;vol.26:1-6;vol.27:1-6;vol.28:1-8;vol.29:1-8;vol.30:1-8;vol.31:1-8;vol.32:1-12;vol.33:1-12;vol.34:1-12;vol.35:1-12;vol.36:1-12;vol.37:1-12;vol.38:1-12;vol.39:1-12;vol.40:1-12;vol.41:1-2
Portico
1981-2026
Preserved
2026-04-23
Preserved : 1981: 1(1-6), 1982: 2(1-6), 1983: 3(1-6), 1984: 4(1-6), 1985: 5(1-6), 1986: 6(1-6), 1987: 7(1-6), 1988: 8(1-6), 1989: 9(1-6), 1990: 10(1-6), 1991: 11(1-6), 1992: 12(1-6), 1993: 13(1-6), 1994: 14(1-6), 1995: 15(1-6), 1996: 16(1-6), 1997: 17(1, S 1, 2-6), 1998: 18(1-6), 1999: 19(1, S 1, 2-6), 2000: 20(1, S 1, 2-6), 2001: 21(1, S 1, 2-6), 2002: 22(1-6), 2003: 23(1-6), 2004: 24(1-6), 2005: 25(1-6), 2006: 26(1-6), 2007: 27(1-6), 2008: 28(1-8), 2009: 29(1-8), 2010: 30(1-8), 2011: 31(1-8), 2012: 32(1-12), 2013: 33(1-12), 2014: 34(1-12), 2015: 35(1-12), 2016: 36(1-12), 2017: 37(1-12), 2018: 38(1-12), 2019: 39(1-12), 2020: 40(1-12), 2021: 41(1-12), 2022: 42(1-12), 2023: 43(1-12), 2024: 44(1-12), 2025: 45(1-12), 2026: 46(1-4)
CLOCKSS Archive
1991-2026
Preserved
2026-04-13
11 to 46
National Digital Preservation Program, China
1996-2025
Preserved
2025-10-23
Preserved : 2 (S1, 1 to 6); 3 (1 to 8); 4 (1 to 9, 11, 12); 16 (1 to 6); 17 (S1, 1 to 6); 18 (1 to 6); 19 (S1, 1 to 6); 21 (S1, 1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 9, 11, 12); 33 (1 to 9, 11, 12); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1, 2, 4 to 9, 11, 12); 45 (1 to 9)
National Digital Preservation Program, China
1996-2025
Preserved
2025-12-04
Preserved : 2 (S1, 1 to 6); 3 (1 to 8); 4 (1 to 9, 11, 12); 16 (1 to 6); 17 (S1, 1 to 6); 18 (1 to 6); 19 (S1, 1 to 6); 21 (S1, 1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 8); 29 (1 to 8); 31 (1 to 8); 32 (1 to 9, 11, 12); 33 (1 to 9, 11, 12); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1, 2, 4 to 9, 11, 12); 45 (1 to 9)