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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 51 (2 to 4); 52 (1 to 4); 53 (1, 2-3, 4); 54 (1, 2, 3-4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4); 60 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 70 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 80 (1 to 4); 81 (3, 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1 to 4); 88 (1, 2)
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Portico
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Preserved
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2026-04-16
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Preserved : 1989: 51(1-4), 1990: 52(1-4), 1991: 53(1-4), 1992: 54(1-4), 1993: 55(1-4), 1994: 56(1-4), 1995: 57(1-4), 1996: 58(1-4), 1997: 59(1-4), 1998: 60(1-4), 1999: 61(1-4), 2000: 62(1-4), 2001: 63(1-4), 2002: 64(1-4), 2003: 65(1-4), 2004: 66(1-4), 2005: 67(1-4), 2006: 68(1-4), 2007: 69(1-4), 2008: 70(1-4), 2009: 71(1-4), 2010: 72(1-4), 2011: 73(1-4), 2012: 74(1-4), 2013: 75(1-4), 2014: 76(1-4), 2015: 77(2-4), 2016: 78(1-4), 2017: 79(1-4), 2018: 80(1-4), 2019: 81(1-4), 2020: 82(1-4), 2021: 83(1-4), 2022: 84(1-4), 2023: 85(1-4), 2024: 86(1-4), 2025: 87(1-4), 2025/2026: 88(1-2)
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LOCKSS Archive
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In Progress
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2026-04-13
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67 to 69
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LOCKSS Archive
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Preserved
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2026-04-13
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70 to 81
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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 (2 to 4); 7 (1 to 4); 8 (1 to 4); 59 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4)
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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 (2 to 4); 7 (1 to 4); 8 (1 to 4); 59 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4)
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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 : 59 (1-4); 60 (1-3); 61 (1); 62; 63 (3); 64 (1, 3, 4); 65 (1-4); 66 (1-4); 67 (1-4); 68 (1-4); 69 (2-4); 70 (1-4); 71 (1-4); 72 (1-4); 73 (1-4); 74 (1-4); 75 (1-4); 76 (supplement-1, 1-4); 77 (1-4); 78 (1-4); 79 (1-4); 80 (1-4); 81 (1-4)
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Library of Congress
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Preserved
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2025-04-07
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80 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1)
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