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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, 2); 2 (, 1 to 4); 3 (, 1 to 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 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 4, 6); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 19 (, 1 to 6); 20 (, 1 to 6); 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 6); 29 (, 1 to 12); 30 (, 1 to 5, 7 to 12); 31 (, 1 to 12); 32 (, 1 to 12); 33 (, 1, 2, 6 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 18); 46 (, 1 to 10); 1980; 1981; 1982; 1983; 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
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Internet Archive
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Preserved
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2025-08-08
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10 to 12
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 1(1-2), 1981: 2(1-4), 1982: 3(1-4), 1983: 4(1-4), 1984: 5(1-4), 1985: 6(1-4), 1986: 7(1-6), 1987: 8(1-6), 1988: 9(1-6), 1989: 10(1-6), 1990: 11(1-6), 1991: 12(1-6), 1992: 13(1-6), 1993: 14(1-6), 1994: 15(1-6), 1995: 16(1-6), 1996: 17(1-6), 1997: 18(1-6), 1998: 19(1-6), 1999: 20(1-6), 2000: 21(1-6), 2001: 22(1-6), 2002: 23(1-6), 2003: 24(1-6), 2004: 25(1-6), 2005: 26(1-6), 2006: 27(1-6), 2007: 28(1-6), 2008: 29(1-12), 2009: 30(1-12), 2010: 31(1-12), 2011: 32(1-12), 2012: 33(1-12), 2013: 34(1-12), 2014: 35(1-12), 2015: 36(1-12), 2016: 37(1-12), 2017: 38(1, S1, 2-12), 2018: 39(1, S1, 2-3, S 3, 4, S 4, 5-12), 2019: 40(1, S 1, 2, S 2, 3-12), 2020: 41(1-12), 2021: 42(1-12), 2022: 43(1-12), 2023: 44(1-12), 2024: 45(1-18), 2025: 46(1, S1, 2, S2, 3, S3, 4-18), 2026: 47(1-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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12 to 47
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.18:1-6;vol.19:1-6;vol.20:1-6;vol.21:1-6;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.28:1-6;vol.29:1-12;vol.30:1-12;vol.31:1-12;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,sup.S1;vol.39:1-12,S2,S3,S4,sup.S1;vol.40:1-12,S1,S2;vol.41:1-12;vol.42:1
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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 6); 3 (1 to 9, 11, 12); 4 (S1, 1, 2, 4 to 9, 11, 12); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 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 6); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 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 to 9, 11, 12); 45 (1 to 9, 11 to 18); 46 (S1, 1 to 9, 11 to 15)
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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 6); 3 (1 to 9, 11, 12); 4 (S1, 1, 2, 4 to 9, 11, 12); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 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 6); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 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 to 9, 11, 12); 45 (1 to 9, 11 to 18); 46 (S2, 1 to 9, 11, 12)
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