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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 4); 6 (, 1 to 4); 7 (, 1 to 4); 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 (, 1/2, 3/4, 5, 6); 16 (, 1 to 6); 17 (, 1 to 6); 18 (, 1 to 6); 19 (, 1 to 4); 20 (, 1 to 4); 21 (, 1 to 4); 22 (, 1 to 4); 23 (, 1 to 4); 24 (, 1 to 4); 25 (, 1 to 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1 to 4); 29 (, 1 to 4); 30 (, 1 to 4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1/2, 3, 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1, 2, 3/4); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 4); 48 (, 1 to 4); 49 (, 1/2, 3, 4); 50 (, 1 to 4); 51 (, 1 to 4); 52 (, 1 to 4); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1 to 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 6); 64 (, 1 to 6); 65 (, 1 to 6); 66 (, 1 to 6); 67 (, 1 to 6); 68 (, 1 to 6); 69 (, 1 to 6); 70 (, 1 to 6); 71 (, 1 to 6); 72 (, 1 to 6); 73 (, 1 to 6); 74 (, 1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (, 1 to 6); 78 (, 1 to 6); 79 (, 1 to 6); 80 (, 1 to 6); 81 (, 1 to 6); 82 (, 1 to 6); 83 (, 1 to 6); 84 (, 1 to 6); 85 (, 1 to 6); 86 (, 1 to 6); 87 (, 1 to 6); 88 (, 1 to 6); 89 (, 1 to 6); 1972; 1973; 1974; 1975; 1976; 1977; 1978; 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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15 to 58
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Portico
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Preserved
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2026-02-12
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Preserved : 1972: 1(1-4), 1973: 2(1-4), 1974: 3(1-4), 1975: 4(1-4), 1976: 5(1-4), 1977: 6(1-4), 1978: 7(1-4), 1979: 8(1-6), 1980: 9(1-6), 1981: 10(1-6), 1982: 11(1-6), 1983: 12(1-6), 1984: 13(1-6), 1985: 14(1-6), 1986: 15(1-6), 1987: 16(1-6), 1988: 17(1-6), 1989: 18(1-6), 1990: 19(1-4), 1990: 20(1-4), 1991: 21(1-4), 1991: 22(1-4), 1992: 23(1-4), 1992: 24(1-4), 1993: 25(1-4), 1993: 26(1-4), 1994: 27(1-4), 1994: 28(1-4), 1995: 29(1-4), 1995: 30(1-4), 1996: 31(1-4), 1996: 32(1-4)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 90
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Portico
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Preserved
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2026-02-12
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Preserved : 2000: 40(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 2007: 53(6), 2007: 54(1, 6), 2008: 55(1-6), 2008: 56(1-6), 2009: 57(1-6), 2009: 58(1-6), 2010: 59(2-6), 2010: 60(1-6), 2011: 61(1-6), 2011: 62(1-6), 2012: 63(1-2, 4-6), 2012: 64(1-3), 2013: 65(1-6), 2013: 66(1-3), 2014: 67(1-6), 2014: 68(1-3, 5-6), 2015: 69(3-6), 2015: 70(1-6), 2016: 71(1-6), 2016: 72(1-6), 2017: 73(1-6), 2017: 74(1-6), 2018: 75(1-6), 2018: 76(1-6), 2018/2019: 77(1-6), 2018/2019: 78(1-6), 2019/2020: 79(1-6), 2019/2020: 80(1-6), 2021: 81(1-6), 2021: 82(1-6), 2022: 83(1-6), 2022: 84(1-6), 2023: 85(1-6), 2023: 86(1-6), 2024: 87(1-6), 2024: 88(1-6), 2025: 89(1-6), 2025: 90(1-6)
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LOCKSS Archive
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In Progress
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2026-02-09
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63, 64, 77
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LOCKSS Archive
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Preserved
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2026-02-09
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65 to 76
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Library of Congress
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Preserved
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2025-04-07
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74 (4); 75 (3 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 80 (1 to 6); 81 (1 to 6); 82 (1, 3 to 6); 83 (1 to 6); 84 (1 to 6); 85 (1 to 6); 86 (1 to 6); 87 (1 to 6); 88 (1 to 4)
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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 : ; 4 (1 to 4); 5 (1 to 4); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1, 3, 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 3); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1, 3, 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 6); 84 (1 to 6); 85 (1 to 6); 86 (1 to 6); 87 (1 to 6); 88 (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 : ; 4 (1 to 4); 5 (1 to 4); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1, 3, 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 3); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1, 3, 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 6); 84 (1 to 6); 85 (1 to 6); 86 (1 to 6); 87 (1 to 6); 88 (1 to 6)
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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 : 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 40 (2); 41 (1, 3, 4); 42 (1-4); 43 (1-4); 44 (1-3); 45 (1-4); 46 (1-4); 47 (1-4); 48 (1, 3, 4); 49 (1-2, 3, 4); 50 (1-4); 51 (1-4); 52 (1-4); 53 (1-4, 6); 54 (1-6); 55 (1-6); 56 (1-6); 57 (1-6); 58 (1-5); 59 (1-6); 60 (1-6); 61 (1-6); 62 (1-6); 63 (1-6); 64 (1-6); 65 (1-6); 66 (1-6); 67 (1-6); 68 (1-6); 69 (1-6); 70 (1-6); 71 (1-6); 72 (1, 3-6); 73 (1-6); 74 (1-6); 75 (1-6); 76 (1-6); 77 (1-6); 78 (1-5)
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