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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 7); 16 (1 to 8); 17 (1 to 12); 18 (1 to 12); 19 (1 to 12); 20 (1 to 12); 21 (1 to 12); 22 (1 to 12); 23 (1 to 12); 24 (1 to 12); 25 (1 to 12); 26 (1 to 13); 27 (1 to 12); 28 (Suppl, 1 to 12); 29 (1 to 12); 30 (1 to 12); 31 (1 to 12); 32 (1, 2, 4 to 12); 33 (1 to 12); 34 (1, 2)
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CLOCKSS Archive
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Preserved
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2026-04-13
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10 to 34
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Portico
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Preserved
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2026-04-16
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Preserved : 2002: 10(1-6), 2003: 11(1-6), 2004: 12(1-6), 2005: 13(1-6), 2006: 14(1-6), 2007: 15(1-7), 2008: 16(1-8), 2009: 17(1-12), 2010: 18(1-12), 2011: 19(1-12), 2012: 20(1-12), 2013: 21(1-12), 2014: 22(1-11), 2015: 23(2-12), 2016: 24(1-12), 2017: 25(1-12), 2018: 26(1-13), 2019: 27(1-12), 2019/2020: 28(1, S 1, 2-12), 2021: 29(1-12), 2022: 30(1-12), 2023: 31(1-12), 2024: 32(1-10, 12), 2025: 33(1, 4-12), 2026: 34(1-3)
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LOCKSS Archive
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In Progress
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2026-04-13
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20, 27
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LOCKSS Archive
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Preserved
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2026-04-13
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21 to 26
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Library of Congress
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Preserved
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2025-04-07
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24 (8); 25 (10, 11); 26 (2 to 13); 27 (1 to 12); 28 (1 to 12, Suppl. 1); 29 (1 to 12); 30 (1 to 12); 31 (1 to 12); 32 (1 to 9)
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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 (1 to 6); 2 (1 to 9, 11, 12); 3 (1 to 9, 11, 12); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 7); 16 (1 to 8); 17 (1 to 9, 11, 12); 18 (1 to 9, 11, 12); 19 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11 to 13); 27 (1 to 9, 11, 12); 28 (Suppl 1, 1 to 9, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (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 : 1 (1 to 6); 2 (1 to 9, 11, 12); 3 (1 to 9, 11, 12); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 7); 16 (1 to 8); 17 (1 to 9, 11, 12); 18 (1 to 9, 11, 12); 19 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11 to 13); 27 (1 to 9, 11, 12); 28 (Suppl 1, 1 to 9, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (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 : 18 (1 to 5)
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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 : 18 (1 to 5)
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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 : 10 (2-6); 11 (1-6); 12 (1-6); 13 (1-6); 14 (1-6); 15 (1-7); 16 (1-8); 17 (1-12); 18 (1-12); 19 (1-12); 20 (1-12); 21 (1-12); 22 (1-12); 23 (1-12); 24 (1-12); 25 (1-12); 26 (1-13); 27 (1-10)
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