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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 51 (1 to 12); 52 (1 to 12); 53 (1 to 12); 54 (1 to 12); 55 (1 to 12); 56 (1 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 12); 60 (1 to 12); 61 (1 to 12); 62 (1 to 12); 63 (1 to 12); 64 (1 to 12); 65 (1 to 12); 66 (1 to 12); 67 (1 to 12); 68 (1 to 12); 69 (1 to 12)
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CLOCKSS Archive
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Preserved
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2026-04-06
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51 to 69
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Portico
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Preserved
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2026-04-02
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Preserved : 2007: 51(1-12), 2008: 52(1-12), 2009: 53(1-12), 2010: 54(1-12), 2011: 55(1-12), 2012: 56(1-9, 12), 2013: 57(1-7, 9, 12), 2014: 58(1-10, 12), 2015: 59(3-12), 2016: 60(1-12), 2017: 61(1-12), 2018: 62(1-12), 2019/2020: 63(1-12), 2020: 64(1-12), 2021: 65(1-12), 2022: 66(1-4, 7-12), 2023: 67(1-12), 2024: 68(1-10), 2025: 69(1-12)
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LOCKSS Archive
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In Progress
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2026-04-06
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56, 63
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LOCKSS Archive
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Preserved
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2026-04-06
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57 to 62
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Library of Congress
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Preserved
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2025-04-07
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62 (1 to 12); 63 (1 to 12); 64 (1 to 12); 65 (1 to 12); 66 (1 to 12); 67 (1 to 12); 68 (1 to 6)
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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 : 6 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9); 68 (1 to 9, 11)
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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 : 6 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9); 68 (1 to 9, 11)
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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 : 54 (5 to 9, 11, 12); 55 (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 : 54 (5 to 9, 11, 12); 55 (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 : 51 (2-12); 52 (1-12); 53 (1-12); 54 (1-12); 55 (1-12); 56 (1-12); 57 (1-9, 11, 12); 58 (1-12); 59 (1-12); 60 (1-12); 61 (1-12); 62 (1-12); 63 (1-9)
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