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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 6); 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 5 (1 to 6); 6 (1 to 6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (Suppl., 1 to 6); 16 (Suppl., 1 to 6); 17 (1 to 4, 5-6); 18 (Suppl., 1 to 6); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 4, 5-6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 4, 5-6); 32 (1 to 6); 33 (1 to 6); 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 (1, 2)
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Internet Archive
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Preserved
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2025-08-08
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1 to 10
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 40
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Portico
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Preserved
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2026-04-23
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Preserved : 1987/1988: 1(1-6), 1988/1989: 2(1-6), 1989: 3(1-6), 1990: 4(1-6), 1991: 5(1-6), 1992: 6(1-6), 1993: 7(1-2, S 2, 3-6), 1994: 8(1-6), 1995: 9(1-6), 1996: 10(1-5)
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LOCKSS Archive
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Preserved
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2026-04-13
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1 to 9, 11 to 33
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LOCKSS Archive
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In Progress
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2026-04-13
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10
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Portico
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Preserved
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2026-04-23
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Preserved : 2002: 16(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 2005: 19(1, 4)
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Portico
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Preserved
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2026-04-23
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Preserved : 2007: 21(1-4, 6), 2008: 22(1-6), 2009: 23(1-6), 2010: 24(1-6), 2011: 25(1-6), 2012: 26(1-3, 6), 2013: 27(1-6), 2014: 28(1-6), 2015: 29(1-6), 2016: 30(1-6), 2017: 31(1-6), 2018: 32(1-6), 2019: 33(1-6), 2020: 34(1-6), 2021: 35(1-6), 2022: 36(1-6), 2023: 37(1-5), 2024: 38(1-6), 2025: 39(1-6)
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Library of Congress
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Preserved
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2025-04-07
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31 (4); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 5)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 1 (3, 6); 2 (1 to 6); 3 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 5); 18 (1 to 6); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 5); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 5); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 1 (3, 6); 2 (1 to 6); 3 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 5); 18 (1 to 6); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 5); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 5); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6)
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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 : 11 (2-6); 12 (1-6); 13 (1-6); 14 (1-6); 15 (Supplement?, 1-6); 16 (Supplement?, 1-6); 17 (1-5); 18 (Supplement?, 1-6); 19 (1-6); 20 (1-6); 21 (1-6); 22 (1-6); 23 (1-6); 24 (1-4, 5-6); 25 (supplement-1, 1-6); 26 (1-6); 27 (1-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1-4, 5-6); 32 (1-6); 33 (1-4)
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