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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, 2, 3-4); 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 4); 19 (, 1 to 4); 20 (, 1 to 6); 21 (, 1 to 6); 22 (, 1 to 6); 23 (, 1 to 6); 24 (, 1 to 6); 25 (, 1); 26 (, 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 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1, 2, 3-4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 6); 45 (, 1 to 6); 46 (, 1 to 12); 47 (, 1 to 12); 48 (, 1 to 12); 49 (, 1 to 12); 50 (, 1 to 12); 51 (, 1 to 12); 52 (, 1 to 12); 53 (, 1 to 12); 54 (, 1 to 4); 1969; 1970; 1971; 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
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 58
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Portico
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Preserved
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2026-02-12
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Preserved : 1969: 1(1-4), 1970: 2(1-4), 1971: 3(1-4), 1972: 4(1-4), 1973: 5(1-4), 1974: 6(1-4), 1975: 7(1-4), 1976: 8(1-4), 1977: 9(1-4), 1978: 10(1-4), 1979: 11(1-4), 1980: 12(1-4), 1981: 13(1-4), 1982: 14(1-4), 1983: 15(1-4), 1984: 16(1-4), 1985: 17(1-4), 1986: 18(1-4), 1987: 19(1-4), 1988: 20(1-6), 1989: 21(1-6), 1990: 22(1-6), 1991: 23(1-6), 1992: 24(1-6), 1993: 25(1), 1994: 26(1-6), 1995: 27(1-6), 1996: 28(1-6), 1997: 29(1-6), 1998: 30(1-6), 1999: 31(1-6), 2000/2001: 32(1-4), 2001/2002: 33(1-4), 2002: 34(1-4), 2003: 35(1-4), 2004: 36(1-4), 2005: 37(1-4), 2006: 38(1-4), 2007: 39(1-4), 2008: 40(1-4), 2009: 41(1-4), 2010: 42(1-4), 2011: 43(1-4), 2012: 44(1-4, 6), 2013: 45(1-3, 6), 2014: 46(1-12), 2015: 47(3-12), 2016: 48(1-12), 2017: 49(1-9, 11-12), 2018: 50(1-12), 2019: 51(1-12), 2019/2020: 52(1-12), 2021: 53(1-12), 2022: 54(1-12), 2023: 55(1-9, 11-12), 2024: 56(1-12), 2025: 57(1-3, 5-12), 2026: 58(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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44
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LOCKSS Archive
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Preserved
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2026-02-09
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45 to 51
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 54 (5 to 12); 55 (, 1 to 12); 56 (, 1 to 12); 57 (, 1 to 8); 2022; 2023; 2024; 2025
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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 to 6); 4 (1 to 4); 5 (1 to 9, 11, 12); 29 (1 to 6); 31 (1 to 6); 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 3); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 6); 45 (1 to 6); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (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 : 3 (1 to 6); 4 (1 to 4); 5 (1 to 9, 11, 12); 29 (1 to 6); 31 (1 to 6); 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 3); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 6); 45 (1 to 6); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (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 : 30 (1); 31 (2-6); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (supplement-1, 1, 4); 37 (1-4); 38 (1, 2, 3-4); 39 (2-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-6); 45 (1-6); 46 (supplement-1, 1-12); 47 (1-12); 48 (1-12); 49 (1-12); 50 (1-12); 51 (1-12); 181 (5)
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