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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 39 (1 to 12); 40 (1 to 12); 41 (1 to 13); 42 (1 to 13); 43 (1 to 13); 44 (1 to 12); 45 (1 to 12); 46 (1 to 12); 47 (1 to 12); 48 (1 to 12); 49 (1 to 12); 50 (1 to 12); 51 (1 to 12); 52 (1 to 12); 53 (1 to 12); 54 (Suppl, 1 to 12); 55 (1 to 12); 56 (Suppl, 1 to 12); 57 (Suppl, 4 to 12); 58 (1 to 14); 59 (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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to 28
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CLOCKSS Archive
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Preserved
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2026-04-06
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39 to 59
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Portico
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Preserved
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2026-04-02
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Preserved : 2006: 39(1-12), 2007: 40(1-12), 2008: 41(1-13), 2009: 42(1-13), 2010: 43(1-13), 2011: 44(1-12), 2012: 45(1-10, 12), 2013: 46(1-7, 9, 11-12), 2014: 47(1-9, 11-12), 2015: 48(3-12), 2016: 49(1-12), 2017: 50(1-8, 10-12), 2018: 51(1-12), 2019/2020: 52(1-12), 2020: 53(1-12), 2021: 54(1, S 1, 2-12), 2022: 55(1-12), 2023: 56(1, S 1, 2, S 2, 3-12), 2024: 57(1-2, S 2, 3-11), 2025: 58(1-14), 2026: 59(1-4)
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LOCKSS Archive
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In Progress
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2026-04-06
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45, 52
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LOCKSS Archive
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Preserved
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2026-04-06
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46 to 51
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Library of Congress
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Preserved
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2025-04-07
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50 (12); 51 (1 to 12); 52 (1 to 12); 53 (1 to 12); 54 (1, S1, 2 to 12); 55 (1 to 12); 56 (S1, 1, 2, S2, 3 to 12); 57 (1 to 10)
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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 : 4 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11 to 13); 42 (1 to 9, 11 to 13); 43 (1 to 9, 11 to 13); 44 (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 : 4 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11 to 13); 42 (1 to 9, 11 to 13); 43 (1 to 9, 11 to 13); 44 (1 to 9, 11, 12)
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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 : 4 (1 to 9, 11, 12); 5 (1 to 9, 11, 12); 39 (Suppl 1, 1 to 9, 11, 12); 41 (1 to 9, 11 to 13); 42 (1 to 9, 11 to 13); 43 (1 to 9, 11 to 13); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (Suppl 1, 1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (Suppl 2, 1 to 9, 11, 12); 57 (Suppl 2, 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 : 4 (1 to 9, 11, 12); 5 (1 to 9, 11, 12); 39 (Suppl 1, 1 to 9, 11, 12); 41 (1 to 9, 11 to 13); 42 (1 to 9, 11 to 13); 43 (1 to 9, 11 to 13); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (Suppl 1, 1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (Suppl 2, 1 to 9, 11, 12); 57 (Suppl 2, 1 to 9, 11, 12)
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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 : 39 (1-9, 11, 12); 40 (1-10, 12); 41 (1-13); 42 (1-13); 43 (1-13); 44 (1, 3-12); 45 (1-12); 46 (1-12); 47 (1-12); 48 (1-12); 49 (1-12); 50 (1-12); 51 (1-12); 52 (2-10)
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