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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 6); 2 (, 1 to 6); 3 (, 1 to 6); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1 to 6); 7 (, 1 to 6); 8 (, 1 to 6); 9 (, 1 to 6); 10 (, 1, 2-3, 4 to 8); 11 (, 1-2, 3 to 5, 6-7, 8 to 12); 12 (, 1 to 12); 13 (, 1, 2-3, 4); 14 (, 1-2, 3 to 5, 6-7, 8 to 12); 15 (, 1 to 12); 16 (, 1-12); 17 (, 1 to 13); 18 (, 1 to 12); 19 (, 1-12); 20 (, 1 to 13); 21 (, 1 to 5, 6-7, 8 to 12); 22 (, 1-12); 23 (, 1 to 6, 7-8, 9 to 13); 24 (, 1 to 13); 25 (, 1 to 6, 7-8, 9 to 13); 26 (, 1 to 13); 27 (, 1 to 4, 5-6, 7 to 12); 28 (, 1); 29 (, 1 to 12); 30 (, 1); 31 (, 1 to 12); 32 (, 1); 33 (, 1 to 8, 10-11, 12); 34 (, 1); 35 (, 1 to 13); 36 (, 1 to 4, 5-6, 7 to 13); 37 (, 1 to 13); 38 (, 1 to 11, 12-13); 39 (, 1, 2-3, 4 to 11, 12-13); 40 (, 1, 2, 3-4, 5, 6-7, 8 to 13); 41 (, 1 to 11, 12-13); 42 (, 1 to 5, 6-7, 8, 9, 10-11, 12-13); 43 (, 1‐2, 3 to 13); 44 (, 1, 2, 6 to 10, 11-12, 13); 45 (, 1 to 11, 13); 46 (, 1 to 9, 10-11, 12-13); 47 (, 1 to 13); 48 (, 1 to 13); 49 (, 1 to 13); 50 (, 1 to 11, 12-13); 51 (, 1 to 13); 52 (, 1-2, 3 to 12); 53 (, 1 to 12); 54 (, 1 to 12); 55 (, 1 to 5, 6-7, 8 to 12); 56 (, 1 to 12); 57 (, 1 to 8); 1979; 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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4 to 38
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CLOCKSS Archive
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Preserved
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2026-02-09
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1, 17 to 58
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Portico
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Preserved
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2026-02-12
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Preserved : 1979: 1(1-6), 1980: 2(1-6), 1981: 3(1-6), 1982: 4(1-6), 1983: 5(1-6), 1984: 6(1-6), 1985: 7(1-6), 1986: 8(1-6), 1986: 9(1-6), 1987: 10(1-8), 1988: 11(1-12), 1988: 12(1-12), 1988: 13(1-4), 1989: 14(1-12), 1990: 15(1-12), 1990: 16(1-12), 1991: 17(1-13), 1992: 18(1-12), 1992: 19(1-12), 1993: 20(1-13), 1994: 21(1-12), 1994: 22(1-12), 1995: 23(1-13), 1996: 24(1-13), 1997: 25(1-13), 1998: 26(1-13), 1999: 27(1-12), 1999: 28(1), 2000: 29(1-12), 2000: 30(1), 2001: 31(1-12), 2001: 32(1), 2002: 33(1-12), 2002: 34(1), 2003: 35(1-13), 2004: 36(1-13), 2005: 37(1-13), 2006: 38(1-13), 2007: 39(1-13), 2008: 40(1-13), 2009: 41(1-13), 2010: 42(1-11), 2011: 43(1-13), 2012: 44(1-13), 2013: 45(1-13), 2014: 46(1, S 1, 2-13), 2015: 47(1-13), 2016: 48(1-13), 2017: 49(1-13), 2018: 50(1-13), 2019: 51(1-13), 2020: 52(1-12), 2021: 53(1-12), 2022: 54(1-12), 2023: 55(1-12), 2024: 56(1-12), 2025: 57(1-12), 2026: 58(1-3)
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.25:1-6,9-13,7-8;vol.26:1-13;vol.27:1-4,7-12,5-6;vol.28:1;vol.29:1-12;vol.30:1;vol.31:1-12;vol.32:1;vol.33:1-9,12,10-11;vol.34:1;vol.35:1-13;vol.36:1-4,7-13,5-6;vol.37:1-13;vol.38:1-11,12-13;vol.39:1-1,4-11,12-13,2-3;vol.40:1-2,5-5,8-13,3-4,6-7;vol.41:1-11,12-13;vol.42:1-5,8-9,10-11,12-13,6-7;vol.43:3-13,1-2;vol.44:1-10,13,11-12;vol.45:1-10,13,11-12;vol.46:1-9,10-11,12-13,S1;vol.47:1-13;vol.48:1-13;vol.49:1-13;vol.50:1-11,12-13;vol.51:1-13;vol.52:3-12,1-2;vol.53:1
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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 : 3 (1); 4 (2, 3?4, 5, 6?7, 8, 9, 11 to 13); 5 (1 to 9, 11, 12-13); 24 (1 to 9, 11 to 13); 25 (1 to 6, 7?8, 9, 11 to 13); 26 (1 to 9, 11 to 13); 27 (1 to 4, 5?6, 7 to 9, 11, 12); 28 (1); 29 (2 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1); 33 (2 to 9, 12); 34 (1); 35 (2 to 9, 11 to 13); 36 (1 to 4, 5?6, 7 to 9, 11 to 13); 37 (1 to 9, 11 to 13); 38 (1 to 9, 11, 12?13); 39 (1, 2?3, 4 to 9, 11, 12?13); 41 (1 to 9, 11, 12?13); 42 (1 to 5, 6?7, 8, 9, 12?13); 43 (1?2, 3 to 9, 11 to 13); 44 (1 to 9, 11-12, 13); 45 (1 to 9, 11-12, 13); 46 (S1, 1 to 9, 12-13); 47 (1 to 9, 11 to 13); 48 (1 to 9, 11 to 13); 49 (1 to 9, 11 to 13); 51 (1 to 9, 11 to 13); 52 (1-2, 3 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 5, 6-7, 8, 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 8)
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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 : 3 (1); 4 (2, 3?4, 5, 6?7, 8, 9, 11 to 13); 5 (1 to 9, 11, 12-13); 24 (1 to 9, 11 to 13); 25 (1 to 6, 7?8, 9, 11 to 13); 26 (1 to 9, 11 to 13); 27 (1 to 4, 5?6, 7 to 9, 11, 12); 28 (1); 29 (2 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1); 33 (2 to 9, 12); 34 (1); 35 (2 to 9, 11 to 13); 36 (1 to 4, 5?6, 7 to 9, 11 to 13); 37 (1 to 9, 11 to 13); 38 (1 to 9, 11, 12?13); 39 (1, 2?3, 4 to 9, 11, 12?13); 41 (1 to 9, 11, 12?13); 42 (1 to 5, 6?7, 8, 9, 12?13); 43 (1?2, 3 to 9, 11 to 13); 44 (1 to 9, 11-12, 13); 45 (1 to 9, 11-12, 13); 46 (S1, 1 to 9, 12-13); 47 (1 to 9, 11 to 13); 48 (1 to 9, 11 to 13); 49 (1 to 9, 11 to 13); 51 (1 to 9, 11 to 13); 52 (1-2, 3 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 5, 6-7, 8, 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 8, 11)
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