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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 3); 2 (1 to 3); 3 (1 to 3); 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 4); 15 (s1, 1 to 6, 972); 16 (s1, 1 to 6); 17 (Supplement, 1 to 6); 18 (S1, 1 to 6); 19 (S1, 1 to 6); 20 (s1, 1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (s1, 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 (2 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 7); 45 (1 to 7)
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Portico
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Preserved
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2026-04-09
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Preserved : 1995: 15(1, S 1, 2, S 2, 3-6), 1996: 16(1, S 1, 2, S 2, 3-6), 1997: 17(1, S 1, 2, S 2, 3-6), 1998: 18(1, S 1, 2, S 2, 3-6), 1999: 19(1, S 1, 2, S 2, 3-6), 2000: 20(1-6), 2001: 21(1-6)
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Internet Archive
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Preserved
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2025-08-08
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1 to 17
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.17:1-6;vol.18:1-6,sup.S1,sup.S2;vol.19:1-6,sup.S1,sup.S2;vol.20:1-6,sup.s1;vol.21:1-6;vol.22:1-6;vol.23:1-6;vol.24:1-6;vol.25:1-6;vol.26:1-6,sup.s1;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;vol.35:1-6;vol.36:1-6;vol.37:1-6;vol.38:1-6;vol.39:1-6;vol.40:1-6;vol.41:1
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Portico
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Preserved
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2026-04-09
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Preserved : 1981: 1(1-3), 1982: 2(1-3), 1983: 3(1-3), 1984: 4(1-4), 1985: 5(1-4), 1986: 6(1-4), 1987: 7(1-4), 1988: 8(1-4), 1989: 9(1-4), 1990: 10(1-4), 1991: 11(1-4), 1992: 12(1-4), 1993: 13(1-4), 1994: 14(1-4), 1995: 15(1-2, S 2, 3-6), 1996: 16(1-6), 1997: 17(1-6), 1998: 18(1, S1, 2, S2, 3-6), 1999: 19(1, S1, 2, S2, 3-6), 2000: 20(1-6), 2001: 21(1-6), 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(1-6), 2009: 29(1-6), 2010: 30(1-6), 2011: 31(1-6), 2012: 32(1-6), 2013: 33(1-6), 2014: 34(1-6), 2015: 35(1-6), 2016: 36(1-6), 2017: 37(1-6), 2018: 38(1-6), 2019: 39(1-6), 2020: 40(1-6), 2021: 41(1-6), 2022: 42(1-6), 2023: 43(1-6), 2024: 44(1-7), 2025: 45(1-7)
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CLOCKSS Archive
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Preserved
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2026-04-06
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6, 8, 11 to 45
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 46
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 15 (S1, 1-6); 16 (S1, 1-6); 17 (S1, 1-6); 18 (S1, 1-6); 19 (S1, 1-6); 20 (1-6); 21 (1-6); 26 (s1, 1-6); 27 (1-6)
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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 6); 4 (1 to 6); 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 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 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 3, 5, 7); 45 (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 : 2 (, 1 to 6); 3 (1 to 6); 4 (1 to 6); 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 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 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 3, 5, 7); 45 (1 to 6)
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