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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (2, 3); 2 (1 to 3); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 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 9); 14 (1 to 9); 15 (1 to 9); 16 (1-2, 3 to 9); 17 (1 to 6); 19 (1); 20 (2 to 8); 21 (1 to 9); 22 (1 to 8); 23 (Suppl, 1 to 7); 24 (s01, 1 to 6); 25 (S1, 1 to 6); 26 (Suppl, 1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (1 to 12); 38 (1 to 12); 39 (1 to 12); 40 (Suppl, 1 to 12); 41 (Suppl, 1 to 12); 42 (Suppl, 1 to 12); 43 (Suppl, 1 to 12); 44 (Suppl, 1 to 12); 45 (Suppl, 1 to 3, 5 to 12); 46 (Suppl, 1 to 12); 47 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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27
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Portico
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Preserved
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2026-04-23
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Preserved : 1979: 1(3)
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CLOCKSS Archive
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Preserved
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2026-04-13
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1, 21 to 47
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Portico
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Preserved
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2026-04-23
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Preserved : 2000: 21(1-6), 2001/2002: 22(1-6), 2002/2003: 23(1, S 1, 2-6), 2003/2004: 24(1-4, S 4, 5-6), 2004/2005: 25(1-4, S 4, 5-6), 2005/2006: 26(1-4, S 4, 5-6), 2006: 27(1-6), 2007: 28(1-6), 2008: 29(1-6), 2009: 30(1-6), 2010: 31(1-6), 2011: 32(1-6), 2012: 33(1-6), 2013: 34(1-12), 2014: 35(1-12), 2015: 36(1, S 1, 2-12), 2016: 37(1-12), 2017: 38(1-12), 2018: 39(1-12), 2019: 40(1-3, S 3, 4-12), 2020: 41(1, S 1, 2, S 2, 3-12), 2021: 42(1, S 1, 2-12), 2022: 43(1, S 1, 2, S 2, 3-12), 2023: 44(S 1, None, 2, S 2, 3-12), 2024: 45(1-12), 2025: 46(1, S 1, 2-7, 9-12), 2026: 47(1-5)
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LOCKSS Archive
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In Progress
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2026-04-13
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33, 40
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LOCKSS Archive
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Preserved
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2026-04-13
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34 to 39
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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 : 2 (Suppl 2, 1 to 6); 3 (Suppl 2, 1 to 6); 4 (Suppl 1, 1 to 9, 11, 12); 18 (Suppl 4, 1 to 6); 19 (Suppl 6, 1 to 6); 21 (Suppl 3, 1 to 6); 22 (Suppl 2, 1 to 6); 23 (Suppl 2, 1 to 6); 24 (Suppl 3, 1 to 6); 25 (Suppl 3, 1 to 6); 26 (Suppl 3, 1 to 6); 27 (Suppl 3, 1 to 6); 28 (Suppl 2, 1 to 6); 29 (Suppl 3, 1 to 6); 31 (Suppl 2, 1 to 6); 32 (Suppl 3, 1 to 6); 33 (Suppl 1, 1 to 6); 34 (Suppl 1, 1 to 9, 11, 12); 35 (Suppl 1, 1 to 9, 11, 12); 36 (Suppl 2, 1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (Suppl 2, 1 to 9, 11, 12); 39 (Suppl 1, 1 to 9, 11, 12); 41 (Suppl 1, 1 to 9, 11, 12); 42 (Suppl 1, 1 to 9, 11, 12); 43 (Suppl 2, 1 to 9, 11, 12); 44 (Suppl 2, 1 to 9, 11, 12); 45 (Suppl 1, 1 to 9, 11, 12)
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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 : 2 (Suppl 2, 1 to 6); 3 (Suppl 2, 1 to 6); 4 (Suppl 1, 1 to 9, 11, 12); 18 (Suppl 4, 1 to 6); 19 (Suppl 6, 1 to 6); 21 (Suppl 3, 1 to 6); 22 (Suppl 2, 1 to 6); 23 (Suppl 2, 1 to 6); 24 (Suppl 3, 1 to 6); 25 (Suppl 3, 1 to 6); 26 (Suppl 3, 1 to 6); 27 (Suppl 3, 1 to 6); 28 (Suppl 2, 1 to 6); 29 (Suppl 3, 1 to 6); 31 (Suppl 2, 1 to 6); 32 (Suppl 3, 1 to 6); 33 (Suppl 1, 1 to 6); 34 (Suppl 1, 1 to 9, 11, 12); 35 (Suppl 1, 1 to 9, 11, 12); 36 (Suppl 2, 1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (Suppl 2, 1 to 9, 11, 12); 39 (Suppl 1, 1 to 9, 11, 12); 41 (Suppl 1, 1 to 9, 11, 12); 42 (Suppl 1, 1 to 9, 11, 12); 43 (Suppl 2, 1 to 9, 11, 12); 44 (Suppl 2, 1 to 9, 11, 12); 45 (Suppl 1, 1 to 9, 11, 12)
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Library of Congress
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Preserved
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2025-04-07
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31 (1, S1, S2, 2, S3, 3 to 6); 32 (1, S1, 2, S2, S3, 3 to 6); 33 (1, S1, 2 to 6); 34 (S1, 1 to 12); 35 (S1, 1 to 12); 36 (S1, 1, 2, S2, 3 to 12); 37 (1 to 12); 38 (1, S1, 2, S2, 3 to 12); 39 (1, S1, 2 to 12); 40 (1, S1, S2, 2, S3, 3 to 12); 41 (S1, 1, 2, S2, 3 to 12); 42 (1, S1, 2 to 12); 43 (S1, 1, 2, S2, 3 to 12); 44 (1, S1, 2, S2, 3 to 12); 45 (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 : 21 (1-6); 22 (1-6); 23 (supplement-2, 1-6); 24 (supplement-1, 1-6); 25 (1-6); 26 (1-6); 27 (1-6); 28 (1-6); 29 (supplement-5, 1-6); 30 (supplement-1, 1-6); 31 (supplement-1, 1-6); 32 (supplement-1, 1-6); 33 (supplement-1, 1-6); 34 (supplement-1, 1-12); 35 (supplement-1, 1-12); 36 (supplement-1, 1-12); 37 (1-12); 38 (supplement-1, 1-12); 39 (supplement-1, 1-12); 40 (supplement-1, 1-12)
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