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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (2, 3); 2 (, 1 to 4); 3 (, 1‐2, 3, 4); 4 (, 1, 2, 3‐4); 5 (, 1, 2, 3‐4); 6 (, 1‐2, 3, 4); 7 (, 1‐2, 3‐4); 8 (, 1‐2, 3, 4); 9 (, 1‐2, 3‐4); 10 (, 1‐2, 3, 4); 11 (, 1‐2, 3, 4); 12 (, 1‐2, 3, 4); 13 (, 1‐2, 3, 4); 14 (, 1‐2, 3, 4); 15 (, 1, 4); 16 (, 1, 2, 3‐4); 17 (, 1‐2); 18 (, 1‐2); 19 (, 1‐2); 20 (, 1‐2, 3‐4); 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, 2); 31 (, 1, 2‐3, 4); 32 (, 1 to 4); 33 (, 1, 2, 3‐4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 6); 39 (, 1 to 6); 40 (, 1 to 6); 41 (, 1 to 5); 42 (, 1 to 5); 43 (, 1-2, 3 to 5); 44 (, 1 to 5); 45 (, 1 to 5); 46 (, 1 to 5); 47 (, 1 to 5); 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 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 3); 1963; 1964; 1965; 1966; 1967; 1968; 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; 2023; 2024; 2025
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Portico
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Preserved
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2026-02-12
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Preserved : 1963: 1(2-3), 1964: 2(1-4), 1965: 3(1-4), 1966: 4(1-4), 1967: 5(1-4), 1968: 6(1-4), 1969: 7(1-4), 1970: 8(1-4), 1971: 9(1-4), 1972: 10(1-4), 1973: 11(1-4), 1974: 12(1-4), 1975: 13(1-4), 1976: 14(1-4), 1977: 15(1, 4), 1978: 16(1-4), 1979: 17(1-2), 1980: 18(1-2), 1981: 19(1-2), 1982: 20(1-4), 1983: 21(1-4), 1984: 22(1-4), 1985: 23(1-4), 1986: 24(1-4), 1987: 25(1-4), 1988: 26(1-4), 1989: 27(1-4), 1990: 28(1-4), 1991: 29(1-4), 1992: 30(1-2), 1993: 31(1-4), 1994: 32(1-4), 1995: 33(1-4), 1996: 34(1-4), 1997: 35(1-4), 1998: 36(1-4), 1999: 37(1-4), 2000/2001: 38(1-6), 2001: 39(1-6), 2002: 40(1-6), 2003: 41(1-5), 2004: 42(1-5), 2005: 43(3-5), 2006: 44(1-5), 2007: 45(1-5), 2008: 46(1-5), 2009: 47(1-5), 2010: 48(1-6), 2011: 49(1-6), 2012: 50(1-6), 2013: 51(1-6), 2014: 52(1-6), 2015: 53(1-6), 2016: 54(1-6), 2017: 55(1, S1, 2-6), 2018: 56(1-6), 2019: 57(1-6), 2020: 58(1-6), 2021: 59(1-6), 2022: 60(1-6), 2023: 61(1-6), 2024: 62(1-6), 2025: 63(1-6), 2026: 64(1-2)
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CLOCKSS Archive
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Preserved
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2026-02-09
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29 to 64
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Portico
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Preserved
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2026-02-12
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Preserved : 1962: 2(1-4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1961: 1(1-4)
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Library of Congress
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Preserved
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2025-04-07
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53 (1 to 6); 54 (1 to 5); 55 (2 to 6, S1); 56 (1 to 3, 5); 57 (2 to 6); 58 (1, 3 to 6); 59 (1 to 6); 60 (1 to 6); 61 (3, 5); 62 (2)
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