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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, 2, 3-4); 18 (, 1 to 4); 19 (, 1, 2, 3-4); 20 (, 1 to 4); 21 (, 1 to 4); 22 (, 1, 3, 4); 23 (, 3, 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, 2-3, 4 to 6); 40 (, 1 to 3, 4-5, 6); 41 (, 1 to 6); 42 (, 1 to 3, 4-5, 6); 43 (, 1 to 6); 44 (, 1 to 4, 5-6); 45 (, 1 to 6); 46 (, 1 to 6); 47 (, 1 to 6); 48 (, 1 to 6); 49 (, 1-2, 3 to 6); 50 (, 1 to 3 to 5, 6); 51 (, 1, 2-3, 4 to 6); 52 (, 1_suppl, 2 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 to 3); 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; 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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12 to 39
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CLOCKSS Archive
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In Progress
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2026-02-09
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LOCKSS Archive
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In Progress
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2026-02-09
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Portico
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Preserved
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2026-02-12
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Preserved : 2025: 56(4-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1970: 1(1-4), 1971: 2(1-4), 1972: 3(1-4), 1973: 4(1-4), 1974: 5(1-4), 1975: 6(1-4), 1976: 7(1-4), 1977: 8(1-4), 1978: 9(1-4), 1979: 10(1-4), 1980: 11(1-4), 1981: 12(1-4), 1982: 13(1-4), 1983: 14(1-4), 1984: 15(1-4), 1985: 16(1-4), 1986: 17(1-4), 1987: 18(1-4), 1988: 19(1-4), 1989: 20(1-4), 1990: 21(1-4), 1991: 22(1-4), 1992: 23(1-4), 1993: 24(1-4), 1994: 25(1-4), 1995: 26(1-4), 1996: 27(1-4), 1997: 28(1-4), 1998: 29(1-4), 1999: 30(1-4), 2000: 31(1-4), 2001: 32(1-4), 2002: 33(1-4), 2003: 34(1-4), 2004: 35(1-4), 2005: 36(1-4), 2006: 37(1-4), 2007: 38(1-4), 2008: 39(1-6), 2009: 40(1-6), 2010: 41(1-6), 2011: 42(1-6), 2012: 43(1-6), 2013: 44(1-6), 2014: 45(1-6), 2015: 46(1-6), 2016: 47(1-6), 2017: 48(1-6), 2018: 49(1-6), 2019: 50(1-4, 4, S, 5-6), 2020: 51(1-6), 2021: 52(1, 1, S, 2-6), 2022: 53(1-6), 2023: 54(1-6), 2024: 55(1-6), 2025: 56(1-6)
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CLOCKSS Archive
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In Progress
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2026-02-09
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24 to 38, 47 to 56
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LOCKSS Archive
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In Progress
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2026-02-09
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24 to 34, 40, 56
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LOCKSS Archive
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Preserved
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2026-02-09
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35 to 39, 41 to 55
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CLOCKSS Archive
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Preserved
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2026-02-09
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39 to 46
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Library of Congress
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Preserved
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2025-04-07
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41 (1 to 6); 42 (1 to 4-5, 6); 43 (1 to 6); 44 (1 to 5-6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1-2, 3 to 6); 50 (4_suppl, 1 to 6); 51 (1, 2-3, 4 to 6); 52 (1_suppl, 1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (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 : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-4); 7 (1-4); 8 (1-4); 9 (1-4); 10 (1-4); 11 (1-4); 12 (1-4); 13 (1-4); 14 (1-4); 15 (1-4); 16 (1-4); 17 (1, 2, 3-4); 18 (1-4); 19 (1, 2, 3-4); 20 (1-4); 21 (1-4); 22 (1, 3, 4); 23 (3, 4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1, 2-3, 4-6); 40 (1-3, 4-5, 6); 41 (1-6); 42 (1-3, 6); 43 (2-6); 44 (1-4, 5-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-6); 49 (1-2, 3-6); 50 (1-6)
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British Library
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Preserved
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2019-09-18
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Preserved : 45 (1 to 6), 46 (1 to 6), 47 (1 to 6), 48 (1 to 6), 49 (3 to 5)
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