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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1 to 4); 2 (1 to 4); 3 (1 to 4); 4 (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 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 5); 15 (1 to 5); 16 (1 to 5); 17 (1 to 5); 18 (1 to 5); 19 (1 to 5); 20 (1 to 5); 21 (1 to 5); 22 (1 to 5); 23 (1 to 5); 24 (1 to 5); 25 (1, 3 to 5); 26 (1 to 4); 27 (2 to 5); 28 (1 to 5); 29 (1, 2-3, 4, 5); 30 (1 to 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 23
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Portico
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Preserved
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2026-04-02
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Preserved : 1988: 1(1-4), 1989: 2(1-4), 1990: 3(1-4), 1991: 4(1-4), 1992: 5(1-4), 1993: 6(1-4), 1994: 7(1-4), 1995: 8(1-4), 1996: 9(1-4), 1997: 10(1-4), 1998: 11(1-4), 1999: 12(1-4), 2000: 13(1-4), 2001: 14(1-5), 2002: 15(1-5), 2003: 16(1-5), 2004: 17(1-5), 2005: 18(1-5), 2006: 19(1-5), 2007: 20(1-5), 2008: 21(1-5), 2009: 22(1-5), 2010: 23(1-5), 2011: 24(1-5), 2012: 25(1-5), 2013: 26(1-5), 2014: 27(1-5), 2015: 28(1-5), 2016: 29(1-5), 2017: 30(1-5), 2018: 31(1-5), 2019: 32(1-5), 2020: 33(1-5), 2021: 34(1-5), 2022: 35(1-5), 2023: 36(1-5), 2024: 37(1-5), 2025: 38(1-5), 2026: 39(1-2)
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CLOCKSS Archive
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Preserved
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2026-04-06
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3 to 39
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.10:1-4;vol.11:1-4;vol.12:1-4;vol.13:1-4;vol.14:1-5;vol.15:1-5;vol.16:1-5;vol.17:1-5;vol.18:1-5;vol.19:1-5;vol.20:1-5;vol.21:1-5;vol.22:1-5;vol.23:1-5;vol.24:1-5;vol.25:1-5;vol.26:1-5;vol.27:1-5;vol.28:1-5;vol.29:1-1,4-5,2-3;vol.30:1-5;vol.31:1-5;vol.32:1-5;vol.33:1-5;vol.34:1
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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 : 1 (1 to 4); 2 (1 to 5); 3 (1 to 5); 9 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 5); 15 (1 to 5); 16 (1 to 5); 17 (1 to 5); 18 (1 to 5); 19 (1 to 5); 21 (1 to 5); 22 (1 to 5); 23 (1 to 5); 24 (1 to 5); 25 (1 to 5); 26 (1 to 5); 27 (1 to 5); 28 (1 to 5); 29 (1, 2-3, 4, 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 3)
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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 4); 2 (1 to 5); 3 (1 to 5); 9 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 5); 15 (1 to 5); 16 (1 to 5); 17 (1 to 5); 18 (1 to 5); 19 (1 to 5); 21 (1 to 5); 22 (1 to 5); 23 (1 to 5); 24 (1 to 5); 25 (1 to 5); 26 (1 to 5); 27 (1 to 5); 28 (1 to 5); 29 (1, 2-3, 4, 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 4)
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