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