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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 4); 5 (, 1 to 5); 6 (, 1 to 5); 7 (, 1 to 5); 8 (, 1 to 5); 9 (, 1 to 5); 10 (, 1 to 5); 11 (, 1 to 5); 12 (, 1 to 6); 13 (, 1 to 6); 14 (, 1 to 6); 15 (, 1_suppl, 2 to 6); 16 (, 1_suppl, 2 to 6); 17 (, 1_suppl, 2 to 6); 18 (, 1 to 7); 19 (, 1 to 7); 20 (, 1 to 7); 21 (, 1 to 8); 22 (, 1 to 8); 23 (, 1 to 8); 24 (, 1 to 8); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 1 to 6); 28 (, 1 to 6); 29 (, 1 to 6); 30 (, 1 to 6); 31 (, 1 to 6); 32 (, 1 to 6); 33 (, 1 to 6); 34 (, 1 to 6); 35 (, 1 to 6); 36 (, 1 to 6); 37 (, 1 to 6); 38 (, 1 to 6); 39 (, 1 to 4); 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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1 to 24
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.11:1-5;vol.12:1-6;vol.13:1-6;vol.14:1-6;vol.15:1-6,S1;vol.16:1-6,S1;vol.17:1-6,S1;vol.18:1-7;vol.19:1-7;vol.20:1-7;vol.21:1-8;vol.22:1-8;vol.23:1-8;vol.24:1-8;vol.25:1-6;vol.26:1-6;vol.27:1-6;vol.28:1-6;vol.29:1-6;vol.30:1-6;vol.31:1-6;vol.32:1-6;vol.33:1-6;vol.34:1-6
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 1(1-4), 1988: 2(1-4), 1989: 3(1-4), 1990: 4(1-4), 1991: 5(1-5), 1992: 6(1-5), 1993: 7(1-5), 1994: 8(1-5), 1995: 9(1-5), 1996: 10(1-5), 1997: 11(1-5), 1998: 12(1-6), 1999: 13(1-6), 2000: 14(1-6), 2001: 15(1, S 1, 2-6), 2002: 16(1, S 1, 2-6), 2003: 17(1, S 1, 2-6), 2004: 18(1-7), 2005: 19(1-7), 2006: 20(1-7), 2007: 21(1-8), 2008: 22(1-8), 2009: 23(1-8), 2010: 24(1-6), 2011: 25(1-6), 2012: 26(1-6), 2013: 27(1-6), 2014: 28(1-6), 2015: 29(1-6), 2016: 30(1-6), 2017: 31(1-6), 2018: 32(1-6), 2019: 33(1-6), 2020: 34(1-6)
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CLOCKSS Archive
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Preserved
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2026-02-09
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5 to 34
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CLOCKSS Archive
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In Progress
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2026-02-09
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1 to 39
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LOCKSS Archive
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In Progress
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2026-02-09
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1 to 16, 39
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 1(1-4), 1988: 2(1-4), 1989: 3(1-4), 1990: 4(1-4), 1991: 5(1-5), 1992: 6(1-5), 1993: 7(1-5), 1994: 8(1-5), 1995: 9(1-5), 1996: 10(1-5), 1997: 11(1-5), 1998: 12(1-6), 1999: 13(1-6), 2000: 14(1-6), 2001: 15(1, 1, S, 2-6), 2002: 16(1, 1, S, 2-6), 2003: 17(1, 1, S, 2-6), 2004: 18(1-7), 2005: 19(1-7), 2006: 20(1-7), 2007: 21(1-8), 2008: 22(1-8), 2009: 23(1-8), 2010: 24(1-8), 2011: 25(1-6), 2012: 26(1-6), 2013: 27(1-6), 2014: 28(1-6), 2015: 29(1-6), 2016: 30(1-6), 2017: 31(1-6), 2018: 32(1-6), 2019: 33(1-6), 2020: 34(1-6), 2021: 35(1-6), 2022: 36(1-6), 2023: 37(1-6), 2024: 38(1-6), 2025: 39(1-6), 2026: 40(1)
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LOCKSS Archive
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Preserved
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2026-02-09
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17 to 38
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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 : 1 (1 to 5); 2 (1 to 7); 3 (1 to 6); 11 (1 to 5); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (S1, 1 to 6); 16 (S1, 1 to 6); 17 (S1, 1 to 6); 18 (1 to 7); 19 (1 to 7); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6)
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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 : 1 (1 to 5); 2 (1 to 7); 3 (1 to 6); 11 (1 to 5); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (S1, 1 to 6); 16 (S1, 1 to 6); 17 (S1, 1 to 6); 18 (1 to 7); 19 (1 to 7); 21 (1 to 8); 22 (1 to 8); 23 (1 to 8); 24 (1 to 8); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6)
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Library of Congress
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Preserved
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2025-04-07
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24 (1 to 8); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6)
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