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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 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 (, 1 to 4); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 6); 19 (, 1 to 6); 20 (, 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 5); 29 (, 1 to 6); 30 (, 1, 2, 3/4, 5, 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); 40 (, 1 to 6); 41 (, 1 to 6); 42 (, 1 to 6); 43 (, 1 to 3, 4/5, 6); 44 (, 1 to 3); 45 (, 1, 2, 3/4, 5, 6); 46 (, 1 to 6); 47 (, 1/2, 3 to 6); 48 (, 1 to 6); 49 (, 1, 2/3, 4 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 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1 to 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 12); 62 (, 1 to 12); 63 (, 1 to 12); 64 (, 1 to 12); 65 (, 1 to 12); 66 (, 1 to 12); 67 (, 1 to 12); 68 (, 1 to 12); 69 (, 1 to 12); 70 (, 1 to 12); 71 (, 1 to 12); 72 (, 1 to 12); 73 (, 1, 7 to 12); 74 (, 1 to 12); 75 (, 1 to 12); 76 (, 1 to 12); 77 (, 1 to 12); 78 (, 1 to 12); 79 (, 1 to 7); 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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8 to 62
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Portico
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Preserved
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2026-02-12
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Preserved : 1976: 1(3), 1977: 2(2-3)
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 72
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 80
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Portico
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Preserved
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2026-02-12
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Preserved : 1979: 5(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 7(3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1985: 16(4), 1986: 18(5), 1986: 19(4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1989: 24(3), 1989: 25(2-3)
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Portico
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Preserved
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2026-02-12
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Preserved : 1991: 28(6), 1992: 31(2), 1994: 34(5-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1997: 40(1-6), 1997: 41(1-6), 1998: 42(1-6), 1998: 43(1-6), 1998: 44(1-3), 1999: 45(1-6), 1999: 46(1-6), 1999/2000: 47(1-6), 2000: 48(1-6), 2000/2001: 49(1-6), 2001: 50(1-6), 2001/2002: 51(1-6), 2002: 52(1-6), 2002/2003: 53(1-6), 2003: 54(1-6), 2003/2004: 55(1-6), 2004: 56(1-6), 2004/2005: 57(1-6), 2005: 58(1-6), 2005/2006: 59(1-6), 2006: 60(1-6), 2006/2007: 61(1-12), 2007/2008: 62(1-12), 2008/2009: 63(1-12), 2009/2010: 64(1-12), 2011: 65(1-12), 2012: 66(1-9), 2013: 67(1-10), 2014: 68(1-10, 12), 2015: 69(1, 4-12), 2016: 70(1-12), 2017: 71(1-12), 2018: 72(1-12), 2019: 73(1-12), 2020: 74(1-12), 2021: 75(1-12), 2022: 76(1-12), 2023: 77(1-12), 2024: 78(1-11), 2025: 79(1-12), 2025/2026: 80(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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73
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Library of Congress
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Preserved
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2025-04-07
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70 (11); 71 (10 to 12); 72 (1 to 12); 73 (1 to 12); 74 (1 to 12); 75 (1 to 12); 76 (1 to 12); 77 (1 to 12); 78 (1 to 11)
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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 to 9, 11, 12); 28 (6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 4, 6); 44 (1 to 3); 45 (1 to 3, 5, 6); 46 (1 to 6); 47 (1, 3 to 6); 48 (1 to 6); 49 (1, 2, 4 to 6); 51 (1 to 6); 52 (1 to 6); 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 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (1 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (1 to 9, 11, 12); 78 (1 to 9, 11, 12)
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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 to 9, 11, 12); 28 (6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 4, 6); 44 (1 to 3); 45 (1 to 3, 5, 6); 46 (1 to 6); 47 (1, 3 to 6); 48 (1 to 6); 49 (1, 2, 4 to 6); 51 (1 to 6); 52 (1 to 6); 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 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (1 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (1 to 9, 11, 12); 78 (1 to 9, 11, 12)
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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 : 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-3, 4-5, 6); 44 (1-3); 45 (1, 2, 3-4, 5, 6); 46 (1-6); 47 (1-2, 3-6); 48 (1-6); 49 (1, 2-3, 4-6); 50 (1-6); 51 (1-6); 52 (1-6); 53 (1-6); 54 (1-6); 55 (1-6); 56 (1-6); 57 (1-6); 58 (1-6); 59 (1-6); 60 (1-6); 61 (2-7, 9-12); 62 (1-12); 63 (1-11); 64 (1-12); 65 (1-12); 66 (1-12); 67 (1-12); 68 (1-12); 69 (1-12); 70 (1-12); 71 (1-12); 72 (1-12); 73 (1-10)
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