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Internet Archive
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Preserved
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2025-08-08
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21 to 25
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 19 (1 to 4); 20 (, 1_suppl, 2 to 4); 21 (, 1 to 4); 22 (, 1_suppl, 2 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 to 4); 31 (, 1_suppl, 2 to 4); 32 (, 1_suppl, 2 to 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 3, 4); 37 (, 1 to 3, 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1, 3, 4); 45 (, 1 to 3); 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 : 1981: 1(1-2), 1982: 2(1-4), 1983: 3(1-4), 1984: 4(1-4), 1985: 5(1-4), 1986: 6(1-6), 1987: 7(1-6), 1988: 8(1-6), 1989: 9(1-6), 1990: 10(1-6), 1991: 11(1-6), 1992: 12(1-6), 1993: 13(1-4), 1994: 14(1-4), 1995: 15(1-4), 1996: 16(1-4), 1997: 17(1-4), 1998: 18(1-4), 1999: 19(1-4), 2000: 20(1-4), 2001: 21(1-4), 2002: 22(1-4), 2003: 23(1-4), 2004: 24(1-4), 2005: 25(1-4), 2006: 26(1-4), 2007: 27(1-4), 2008: 28(1-4), 2009: 29(1-4), 2010: 30(1-4), 2011: 31(1-4), 2012: 32(1-4), 2013: 33(1-4), 2014: 34(1-4), 2015: 35(1-4), 2016: 36(1-2, 2, S, 3-4), 2017: 37(1-2, 2, S, 3-4), 2018: 38(1-4), 2019: 39(1-4), 2020: 40(1-4), 2021: 41(1)
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CLOCKSS Archive
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Preserved
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2026-02-09
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33 to 35
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LOCKSS Archive
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Preserved
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2026-02-09
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33 to 35
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Portico
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Preserved
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2026-02-12
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Preserved : 2021: 41(3-4), 2022: 42(1-4), 2023: 43(1-4), 2024: 44(1-4), 2025: 45(1-4), 2026: 46(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 2009: 30(4), 2010/2011: 31(1-4), 2011/2012: 32(1-4), 2013: 33(1-4), 2014: 34(1-4)
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CLOCKSS Archive
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In Progress
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2026-02-09
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22 to 32, 36 to 45
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LOCKSS Archive
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In Progress
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2026-02-09
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22, 45
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LOCKSS Archive
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Preserved
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2026-02-09
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23 to 32, 36 to 44
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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, 2); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-6); 7 (1-6); 8 (1-6); 9 (1-6); 10 (1-6); 11 (1-6); 12 (1-6); 13 (1-4); 14 (1-4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1, 2, 4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1, 2, 4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4)
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British Library
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Preserved
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2019-09-18
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Preserved : 35 (1 to 4), 36 (1 to 4), 37 (1 to 4), 38 (1 to 4)
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Library of Congress
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Preserved
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2025-04-07
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30 (1 to 4); 31 (1_suppl, 1, 4); 32 (1_suppl, 1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (2_suppl, 1 to 4); 37 (2_suppl, 1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1)
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