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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, 2, 3-4); 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 3); 12 (, 1 to 3); 13 (, 1 to 3); 14 (, 1 to 3); 15 (, 1 to 3); 16 (, 1 to 3); 17 (, 1 to 3); 18 (, 1 to 3); 19 (, 1 to 3); 20 (, 1 to 3); 21 (, 1 to 3); 22 (, 1 to 3); 23 (, 1 to 3); 24 (, 1 to 6); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 1 to 6); 28 (, 1 to 6); 29 (, 1 to 8); 30 (, 1 to 8); 31 (, 1 to 8); 32 (, 1 to 8); 33 (, 1 to 8); 34 (, 1 to 4, 5/6, 7, 8); 35 (, 1 to 8); 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 6); 45 (, 1 to 6); 46 (, 1 to 6); 47 (, 1 to 6); 48 (, 1 to 6); 49 (, 1 to 6); 50 (, 1 to 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 4, 5-6); 56 (, 1-2, 3 to 6); 57 (, 1 to 6); 58 (, 1-2, 3, 4-5, 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 6); 64 (, 1-2, 3 to 7); 65 (, 1 to 5, 6-7); 66 (, 1-2, 3, 4-5, 6, 7); 67 (, 1 to 5, 6-7); 68 (, 1-2, 3 to 7); 69 (, 1 to 5, 6-7); 70 (, 1, 3 to 7); 71 (, 1 to 6); 72 (, 1, 3 to 7); 73 (, 1 to 6); 74 (, 1-2, 3 to 7); 75 (, 1 to 5, 6-7); 76 (, 1-2, 3 to 7); 77 (, 1 to 6); 78 (, 3 to 7); 79 (, 1 to 5, 6-7); 80 (, 1-2, 3 to 7); 81 (, 1 to 3, 4-5, 6-7); 82 (, 1-2, 3 to 7); 83 (, 1 to 6); 84 (, 1, 3 to 7); 85 (, 1 to 5, 6-7); 86 (, 1 to 6); 87 (, 1 to 6); 88 (, 1 to 6); 89 (, 1 to 6); 90 (, 1 to 6); 91 (, 1, 2); 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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1 to 51
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Portico
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Preserved
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2026-02-12
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Preserved : 1974/1975: 1(2-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 92
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Portico
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Preserved
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2026-02-12
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Preserved : 1977: 4(2), 1977: 5(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1979: 8(1-2), 1980: 9(1), 1980: 10(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1983: 16(3), 1983: 17(1), 1983: 18(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1985: 21(3), 1986: 23(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 25(2, 5)
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Portico
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Preserved
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2026-02-12
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Preserved : 1989: 27(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1992: 30(7)
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Portico
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Preserved
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2026-02-12
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Preserved : 1994: 32(8)
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Portico
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Preserved
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2026-02-12
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Preserved : 1996/1997: 35(2-8), 1997/1998: 36(1-6), 1998: 37(1-6), 1999: 38(1-6), 1999: 39(1-6), 2000: 40(1-6), 2000: 41(1-6), 2001: 42(1-6), 2001: 43(1-6), 2002: 44(1-6), 2002: 45(1-6), 2003: 46(1-6), 2003: 47(1-6), 2004: 48(1-6), 2004: 49(1-6), 2005: 50(1-6), 2005: 51(1-6), 2006: 52(1-6), 2006: 53(1-6), 2007: 54(1-6), 2007: 55(1-6), 2008: 56(1-6), 2008: 57(1-6), 2009: 58(1-6), 2009: 59(1-6), 2010: 60(1-6), 2010: 61(1-6), 2011: 62(1-6), 2011: 63(1-6), 2012: 64(1-7), 2012: 65(1-2, 5-7), 2013: 66(1-7), 2013: 67(1-7), 2014: 68(1-7), 2014: 69(1-4, 6-7), 2015: 70(1, 5-7), 2015: 71(1-7), 2015/2016: 72(1-7), 2016: 73(1-7), 2017: 74(1-7), 2017: 75(1-7), 2018: 76(1-7), 2018: 77(1-7), 2019: 78(1-7), 2019: 79(1-7), 2019/2020: 80(1-7), 2020: 81(1-7), 2021: 82(1-7), 2021: 83(1-7), 2022: 84(1-7), 2022: 85(1-7), 2022/2023: 86(1-6), 2023: 87(1-6), 2024: 88(1-6), 2024: 89(1-6), 2025: 90(1-6), 2025: 91(1-6), 2025/2026: 92(1-2)
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LOCKSS Archive
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In Progress
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2026-02-09
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64, 65
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LOCKSS Archive
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Preserved
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2026-02-09
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66 to 79
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Library of Congress
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Preserved
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2025-04-07
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76 (4 to 7); 77 (1 to 6-7); 78 (1-2, 3 to 7); 79 (1 to 6-7); 80 (1-2, 3 to 7); 81 (1 to 4-5, 6-7); 82 (1-2, 3 to 7); 83 (1 to 6-7); 84 (1-2, 3 to 7); 85 (1 to 6-7); 86 (1 to 6); 87 (1 to 6); 88 (1 to 6); 89 (1 to 5)
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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 6); 5 (1 to 6); 6 (1 to 6); 7 (1, 3 to 7); 8 (1-2, 3 to 7); 35 (3 to 8); 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 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 5); 56 (1, 3 to 6); 57 (1 to 6); 58 (1, 3, 4, 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1, 3 to 7); 65 (1 to 6); 66 (1, 3, 4, 6, 7); 67 (1 to 6); 68 (1, 3 to 7); 69 (1 to 6); 71 (1 to 6); 72 (1, 3 to 7); 73 (1 to 6); 74 (1, 3 to 7); 75 (1 to 6); 76 (1-2, 3 to 7); 77 (1 to 5, 6-7); 78 (1-2, 3 to 7); 79 (1 to 5, 6-7); 81 (1 to 3, 4-5, 6-7); 82 (1-2, 3 to 7); 83 (1 to 5, 6-7); 84 (1-2, 3 to 7); 85 (1 to 5, 6-7); 86 (1 to 6); 87 (1 to 6); 88 (1 to 6); 89 (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 6); 5 (1 to 6); 6 (1 to 6); 7 (1, 3 to 7); 8 (1-2, 3 to 7); 35 (3 to 8); 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 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 5); 56 (1, 3 to 6); 57 (1 to 6); 58 (1, 3, 4, 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1, 3 to 7); 65 (1 to 6); 66 (1, 3, 4, 6, 7); 67 (1 to 6); 68 (1, 3 to 7); 69 (1 to 6); 71 (1 to 6); 72 (1, 3 to 7); 73 (1 to 6); 74 (1, 3 to 7); 75 (1 to 6); 76 (1-2, 3 to 7); 77 (1 to 5, 6-7); 78 (1-2, 3 to 7); 79 (1 to 5, 6-7); 81 (1 to 3, 4-5, 6-7); 82 (1-2, 3 to 7); 83 (1 to 5, 6-7); 84 (1-2, 3 to 7); 85 (1 to 5, 6-7); 86 (1 to 6); 87 (1 to 6); 88 (1 to 6); 89 (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 : 34 (5-6, 7, 8); 35 (1-8); 36 (1-6); 37 (1-6); 38 (2-6); 39 (1-5); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-6); 49 (2-6); 50 (1-6); 51 (1-6); 52 (1-6); 53 (1-6); 54 (1-3, 5, 6); 55 (1-4, 5-6); 56 (1-2, 3-6); 57 (1-6); 58 (1-2, 3, 4-5, 6); 59 (1-6); 60 (1, 3-6); 61 (1-6); 62 (1-6); 63 (1-6); 64 (1-2, 3-7); 65 (1-5, 6-7); 66 (1-2, 3, 4-5, 6, 7); 67 (1-5, 6-7); 68 (1-2, 3-7); 69 (1-5, 6-7); 70 (1-2, 3-7); 71 (1-5, 6-7); 72 (1-2, 3-7); 73 (1-5, 6-7); 74 (1-2, 3-7); 75 (1-5, 6-7); 76 (1-2, 3-7); 77 (1-5, 6-7); 78 (1-2, 3-7); 79 (1-5)
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