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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 18 (1 to 4); 19 (, 1 to 4); 20 (, 1 to 4); 21 (, 1 to 4); 22 (, 1 to 4); 23 (, 1 to 4); 24 (, 1 to 6); 25 (, 1 to 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1 to 4); 29 (, 1 to 4); 30 (, 1 to 6); 31 (, 1 to 6); 32 (, 1, 2); 33 (, 1, 4, 5); 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 (, 4 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 5, 6b); 53 (, 1 to 7); 54 (, 1 to 6); 55 (, 1 to 7); 56 (, 1 to 6); 57 (, 1 to 7); 58 (, 1, 2, 5, 6); 59 (, 1 to 7); 60 (, 1 to 6); 61 (, 1 to 7); 62 (, 1 to 6); 63 (, 1 to 7); 64 (, 1 to 6); 65 (, 1 to 7); 66 (, 1 to 6); 67 (, 1 to 7); 68 (, 1 to 6); 69 (, 1 to 7); 70 (, 1 to 6); 71 (, 1 to 7); 72 (, 1 to 6); 73 (, 1 to 6); 74 (, 1 to 6); 75 (, 1 to 5); 76 (, 1 to 3, 5, 6); 77 (, 1 to 6); 78 (, 1, 3, 5, 6); 79 (, 1 to 6); 80 (, 1 to 6); 81 (, 1 to 3, 6); 82 (, 1 to 6); 83 (, 1, 3 to 6); 84 (, 1 to 4, 6); 85 (, 1 to 6); 86 (, 1 to 6); 87 (, 1, 3 to 6); 88 (, 1 to 6); 89 (, 1 to 6); 90 (, 1 to 6); 91 (, 1 to 6); 92 (, 1, 2, 4, 5); 93 (, 2 to 6); 94 (, 1 to 6); 95 (, 1 to 6); 96 (, 1 to 6); 97 (, 1 to 6); 98 (, 1 to 6); 99 (, 1 to 6); 100 (, 1 to 6); 101 (, 1 to 6); 102 (, 1 to 3); 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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CLOCKSS Archive
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Preserved
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2026-02-09
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18 to 103
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Portico
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Preserved
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2026-02-12
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Preserved : 1971/1972: 18(1-4), 1972/1973: 19(1-4), 1973/1974: 20(1-4), 1974/1975: 21(1-4), 1975/1976: 22(1-4), 1976/1977: 23(1-4), 1977/1978: 24(1-6), 1979: 25(1-4), 1980: 26(1-2, S 2, 3-4), 1981: 27(1-4), 1982: 28(1-4), 1983: 29(1-4), 1984: 30(1-6), 1985: 31(1-6), 1986: 32(1-6), 1987: 33(1-6), 1988: 34(1-6), 1989: 35(1-6), 1990: 36(1-2, S 2, 3-6), 1991: 37(1-2, S 2, 3-6), 1992: 38(1-6), 1993: 39(1-6), 1994: 40(1-6), 1995: 41(1-6), 1995: 42(1-6), 1996: 43(1-6), 1996: 44(1-6), 1997: 45(1-6), 1997: 46(1-6), 1998: 47(1-6), 1998: 48(1-6), 1999: 49(1-6), 1999: 50(1-6), 2000: 51(1-6), 2000: 52(1-6), 2001: 53(1-7), 2001: 54(1-6), 2002: 55(1-7), 2002: 56(1-6), 2003: 57(1-7), 2003: 58(1-6), 2004: 59(1-7), 2004: 60(1-6), 2005: 61(1-7), 2005: 62(1-6), 2006: 63(1-7), 2006: 64(1-6), 2007: 65(1-7), 2007: 66(1-6), 2008: 67(1-7), 2008: 68(1-6), 2009: 69(1-7), 2009: 70(1-6), 2010: 71(1-7), 2010: 72(1-6), 2011: 73(1-6), 2011: 74(1-6), 2012: 75(1-6), 2012: 76(1-6), 2013: 77(1-6), 2013: 78(1-6), 2014: 79(1-6), 2014: 80(1-6), 2015: 81(1-6), 2015: 82(1-6), 2016: 83(1-6), 2016: 84(1-6), 2017: 85(1-6), 2017: 86(1-6), 2018: 87(1-6), 2018: 88(1-6), 2019: 89(1-6, 6, S), 2019: 90(1-6), 2020: 91(1-6, 6, S), 2020: 92(1-4, 6), 2021: 93(3-6, 6, S), 2021: 94(1-5), 2022: 95(1-6, 6, S), 2022: 96(1-6), 2023: 97(1-6, 6, S), 2023: 98(1-6), 2024: 99(1-6, 6, S), 2024: 100(1-6), 2025: 101(1-5, 5, S, 6), 2025: 102(1-6), 2026: 103(1-2)
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Internet Archive
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Preserved
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2025-08-08
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2 to 80
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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 : 5 (1); 18 (2-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1-6); 25 (1-4); 26 (S2, 1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-6); 31 (1-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (S2, 1-6); 37 (S2, 1-6); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-3-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-6); 49 (1-6); 50 (1-6); 51 (1-3-5, 6); 52 (1-6); 53 (1-7); 54 (1-6); 55 (1, 2, 4-7); 56 (1-3-5, 6); 57 (1-7); 58 (1-6); 59 (1-7); 60 (1-6); 61 (1-7); 62 (1-6); 63 (1-7); 64 (1-6); 65 (1-7); 66 (1-6); 67 (1-7); 68 (2-6); 69 (1, 2-4-7); 70 (1-6); 71 (1-7); 72 (1-6); 73 (1-6); 74 (1-6); 75 (1-6); 76 (1-6); 77 (1-6); 78 (1-6); 79 (1-6); 80 (1-6); 81 (1-6); 82 (1-6); 83 (1-6); 84 (1-6); 85 (1-6); 86 (1-6); 87 (1, 3-6); 88 (1-6); 89 (1-6); 90 (1-5); 167
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