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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1 to 4); 2 (1 to 6); 3 (1 to 6); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1, 2-3, 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 4); 11 (1-2, 3-4); 12 (1 to 4); 13 (1-2, 3, 4); 14 (1 to 4); 15 (1, 2, 3-4); 16 (1 to 4); 17 (1, 2-3, 4); 18 (1, 2, 3-4); 19 (1, 2, 3-4); 20 (1-2, 3-4); 21 (1-2, 3, 4); 22 (1 to 4); 23 (sup1, 1-2, 3, 4); 24 (sup1, 1 to 4); 25 (1-2, 3, 4); 26 (sup1, 1, 2, 3-4); 27 (1-2, 3, 4); 28 (1-2, 3-4); 29 (1, 2-3, 4); 30 (1, 2, 3-4); 31 (1-2, 3); 32 (1 to 4); 33 (1 to 4); 34 (1, 2, 3-4); 35 (1 to 4); 36 (1, 2-3, 4); 37 (1-2, 3); 38 (1 to 4); 39 (1, 2-3, 4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1987: 4(4)
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Portico
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Preserved
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2026-04-09
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Preserved : 2009: 23(1-2)
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Portico
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Preserved
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2026-04-09
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Preserved : 2010: 24(1, S 1, 2-4), 2011: 25(1-4), 2012: 26(1, S 1, 2-4), 2013: 27(1-4), 2014: 28(1-4), 2015: 29(1)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 38
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CLOCKSS Archive
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Preserved
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2026-04-06
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ahead-of-print to 39
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LOCKSS Archive
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In Progress
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2026-04-06
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39
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Portico
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Preserved
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2026-04-09
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Preserved : 1985: 2(2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1999/2000: 13(1-4), 2000: 14(1-4), 2001: 15(1-2), 2002: 16(1-4), 2003: 17(1-4), 2004: 18(1-4), 2005: 19(1-4), 2006: 20(1-4), 2007: 21(1-4), 2008: 22(1-4), 2009: 23(1-2, Suppl 1, 3), 2010: 24(1-2)
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Portico
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Preserved
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2026-04-09
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Preserved : 2011: 25(3-4), 2012: 26(1-4), 2013: 27(1-4), 2014: 28(1-4), 2015: 29(1-4), 2016: 30(1-4), 2017: 31(1-4), 2018: 32(1-4), 2019: 33(1-4), 2020: 34(1-4), 2021: 35(1-4), 2022: 36(1-4), 2023: 37(1-4), 2024: 38(1-4), 2025: 39(1-4)
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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 : 2 (1-2, 3-4); 3 (1, 2, 3-4); 11; 12 (1 to 4); 13 (1-2, 3, 4); 14 (1 to 4); 15 (1, 2, 3-4); 16 (1 to 4); 17 (1, 2-3, 4); 18 (1, 2, 3-4); 19 (1, 2, 3-4); 21 (1-2, 3, 4); 22 (1 to 4); 23 (sup1, 1-2, 3, 4); 24 (sup1, 1 to 4); 25 (1-2, 3, 4); 26 (sup1, 1, 2, 3-4); 27 (1-2, 3, 4); 28 (1-2, 3-4); 29 (1, 2-3, 4); 31 (1-2, 3, 4); 32 (1 to 4); 33 (1 to 4); 34 (1, 2, 3-4); 35 (1 to 4); 36 (1, 2-3, 4); 37 (1-2, 3, 4); 38 (1 to 4); 39 (1)
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Library of Congress
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Preserved
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2025-04-07
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24 (sup1, 1 to 4); 25 (1-2, 3, 4); 26 (sup1, 1 to 3-4); 27 (1-2, 3, 4); 28 (1-2, 3-4); 29 (1, 2-3, 4); 30 (1 to 3-4); 31 (1-2, 3, 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 3-4); 35 (1 to 4); 36 (1, 2-3, 4); 37 (1-2, 3, 4); 38 (1, 2)
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