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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1 to 4); 2 (, 1 to 4); 3 (, 1 to 4); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1 to 6); 7 (, 1 to 6); 8 (, 1 to 5); 9 (, 1 to 6); 10 (, 1 to 8); 11 (, 1 to 8); 12 (, 1 to 8); 13 (, 1 to 8); 14 (, 1 to 10); 15 (, 1 to 12); 17 (, 1 to 15); 18 (, 1 to 15); 19 (, 1 to 15); 20 (, 1 to 15); 21 (, 1 to 15); 22 (, 1 to 15); 23 (, 1 to 15); 24 (, 1 to 15); 25 (, 1 to 15); 26 (, 1 to 15); 27 (, 1 to 15); 28 (, 1 to 15); 29 (, 1 to 15); 30 (, 1 to 15); 31 (, 1 to 15); 32 (, 1, 2, 7 to 11, 13 to 15); 33 (, 1 to 15); 34 (, 1 to 15); 35 (, 1 to 15); 36 (, 1 to 15); 37 (, 1 to 15); 38 (, 1 to 14); 39 (, 1 to 15); 40 (, 1 to 15); 41 (, 1 to 15); 42 (, 1 to 16); 43 (, 1 to 16); 44 (, 1 to 16); 45 (, 1 to 8); 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 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
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Internet Archive
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Preserved
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2025-08-08
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1 to 21
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.17:1-15;vol.18:1-15;vol.19:1-15;vol.20:1-15;vol.21:1-15;vol.22:1-15;vol.23:1-15;vol.24:1-15;vol.25:1-15;vol.26:1-15;vol.27:1-15;vol.28:1-15;vol.29:1-15;vol.30:1-15;vol.31:1-15;vol.32:1-15;vol.33:1-15;vol.34:1-15;vol.35:1-15;vol.36:1-15;vol.37:1-15,sup.S1;vol.38:1-15,sup.S1,sup.S2;vol.39:1-15,sup.S1;vol.40:1-15,sup.S1;vol.41:1
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 8, 11 to 46
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Portico
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Preserved
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2026-02-12
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Preserved : 1989: 9(1-6), 1990: 10(1-8), 1991: 11(1-8), 1992: 12(1-8), 1993: 13(1-8), 1994: 14(1-10), 1995: 15(1-12), 1996: 16(1-12), 1997: 17(1-15), 1998: 18(1-15), 1999: 19(1-15), 2000: 20(1-15), 2001: 21(1-15), 2002: 22(1-15), 2003: 23(1-15), 2004: 24(1-15), 2005: 25(1-15), 2006: 26(1-15), 2007: 27(1-15), 2008: 28(1-15), 2009: 29(1-15), 2010: 30(1-15), 2011: 31(1-15), 2012: 32(1-15), 2013: 33(1-15), 2014: 34(1-15), 2015: 35(1-15), 2016: 36(1-15), 2017: 37(1, S1, 2-15), 2018: 38(1, S1, 2, S2, 3-15), 2019: 39(1, S1, 2-15), 2020: 40(1, S1, 2-15), 2021: 41(1, S1, 2, S2, 3-15), 2022: 42(1, S1, 2-16), 2023: 43(1, S1, 2-16), 2024: 44(1, S1, 2-16), 2025: 45(1, S1, 2-4, 6-16), 2026: 46(1)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 2 (1 to 9, 11 to 15); 3 (1 to 9, 11 to 15); 4 (S1, 1 to 9, 11 to 15); 16 (1 to 9, 11, 12); 17 (1 to 9, 11 to 15); 18 (1 to 9, 11 to 15); 19 (1 to 9, 11 to 15); 21 (1 to 9, 11 to 15); 22 (1 to 9, 11 to 15); 23 (1 to 9, 11 to 15); 24 (1 to 9, 11 to 15); 25 (1 to 9, 11 to 15); 26 (1 to 9, 11 to 15); 27 (1 to 9, 11 to 15); 28 (1 to 9, 11 to 15); 29 (1 to 9, 11 to 15); 31 (1 to 9, 11 to 15); 32 (1 to 9, 11 to 15); 33 (1 to 9, 11 to 15); 34 (1 to 9, 11 to 15); 35 (1 to 9, 11 to 15); 36 (1 to 9, 11 to 15); 37 (, 1 to 9, 11 to 15); 38 (, 1 to 9, 11 to 15); 39 (S1, 1 to 9, 11 to 15); 41 (S1, 1 to 8, 11 to 15); 42 (S1, 1 to 9, 11 to 16); 43 (S1, 1 to 9, 11 to 16); 44 (S1, 1 to 9, 11 to 16); 45 (S1, 1 to 9)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 2 (1 to 9, 11 to 15); 3 (1 to 9, 11 to 15); 4 (S1, 1 to 9, 11 to 15); 16 (1 to 9, 11, 12); 17 (1 to 9, 11 to 15); 18 (1 to 9, 11 to 15); 19 (1 to 9, 11 to 15); 21 (1 to 9, 11 to 15); 22 (1 to 9, 11 to 15); 23 (1 to 9, 11 to 15); 24 (1 to 9, 11 to 15); 25 (1 to 9, 11 to 15); 26 (1 to 9, 11 to 15); 27 (1 to 9, 11 to 15); 28 (1 to 9, 11 to 15); 29 (1 to 9, 11 to 15); 31 (1 to 9, 11 to 15); 32 (1 to 9, 11 to 15); 33 (1 to 9, 11 to 15); 34 (1 to 9, 11 to 15); 35 (1 to 9, 11 to 15); 36 (1 to 9, 11 to 15); 37 (, 1 to 9, 11 to 15); 38 (, 1 to 9, 11 to 15); 39 (S1, 1 to 9, 11 to 15); 41 (S1, 1 to 8, 11 to 15); 42 (S1, 1 to 9, 11 to 16); 43 (S1, 1 to 9, 11 to 16); 44 (S1, 1 to 9, 11 to 16); 45 (S1, 1 to 9, 11, 12)
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