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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1 to 3); 2 (1 to 3); 3 (1 to 3); 4 (1 to 3); 5 (1 to 3); 6 (1 to 3); 7 (1 to 3); 8 (1 to 3); 9 (1 to 3); 10 (1 to 3); 11 (1 to 3); 12 (1 to 3); 13 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1 to 3); 20 (1 to 3); 21 (1 to 3); 22 (1 to 3); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1 to 3); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 30 (1 to 3); 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 6); 38 (1 to 6); 39 (1_suppl, 2 to 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1_suppl, 2 to 6); 44 (1 to 6)
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Portico
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Preserved
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2026-04-23
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Preserved : 1978: 2(2)
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Portico
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Preserved
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2026-04-23
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Preserved : 1988: 12(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1993: 17(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 2002: 26(2)
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Portico
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Preserved
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2026-04-23
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Preserved : 2009: 33(4), 2010: 34(1-4)
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LOCKSS Archive
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In Progress
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2026-04-27
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1 to 26
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CLOCKSS Archive
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In Progress
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2026-04-27
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1 to 29, 31, 41 to 44
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Portico
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Preserved
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2026-04-23
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Preserved : 1977: 1(1-3), 1978: 2(1-3), 1979: 3(1-3), 1980: 4(1-3), 1981: 5(1-3), 1982: 6(1-3), 1983: 7(1-3), 1984: 8(1-3), 1985: 9(1-3), 1986: 10(1-3), 1987: 11(1-3), 1988: 12(1-3), 1989: 13(1-3), 1990: 14(1-3), 1991: 15(1-3), 1992: 16(1-3), 1993: 17(1-3), 1994: 18(1-3), 1995: 19(1-3), 1996: 20(1-3), 1997: 21(1-3), 1998: 22(1-3), 1999: 23(1-3), 2000: 24(1-3), 2001: 25(1-3), 2002: 26(1-3), 2003: 27(1-3), 2004: 28(1-3), 2005: 29(1-3), 2006: 30(1-3), 2007: 31(1-4), 2008: 32(1-4), 2009: 33(1-4), 2010: 34(1-4), 2011: 35(1-4), 2012: 36(1-4), 2013: 37(1-6), 2014: 38(1-6), 2015: 39(1, 1, S, 2-6), 2016: 40(1-6), 2017: 41(1-6), 2018: 42(1-6), 2019: 43(1, 1, S, 2-6), 2020: 44(1-6)
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LOCKSS Archive
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Preserved
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2026-04-27
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27 to 44
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CLOCKSS Archive
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Preserved
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2026-04-27
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30, 32 to 40
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Portico
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Preserved
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2026-04-23
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Preserved : 1997: 21(1-3), 1998: 22(1-3), 1999: 23(1-3), 2000: 24(1-3), 2001: 25(1-3), 2002: 26(1-3), 2003: 27(1-3), 2004: 28(1-3), 2005: 29(1-3), 2006: 30(1-3), 2007: 31(1-4), 2007/2008: 32(1-4), 2009: 33(1-3)
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CLOCKSS Archive
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Preserved
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2026-04-27
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45 to 50
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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 : 25 (2); 26 (1); 27 (3); 29 (2); 31 (1); 32; 33 (2); 35 (1-3); 36 (1-4); 37 (1-6); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1, 3-5)
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British Library
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Preserved
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2019-09-18
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Preserved : 38 (1 to 6), 39 (1 to 6), 40 (1 to 6), 41 (1 to 6), 42 (1 to 5)
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Portico
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Preserved
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2026-04-23
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Preserved : 2015: 39(1, 1, S, 2-6), 2016: 40(1-6), 2017: 41(1-6), 2018: 42(1-6), 2019: 43(1-6), 2020: 44(1-6), 2021: 45(1-6S), 2022: 46(1-6), 2023: 47(1-6, ), 2024: 48(1-6), 2025: 49(1-6), 2026: 50(1)
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