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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 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1); 14 (2 to 6); 15 (1 to 6); 16 (1, 2, 4 to 6); 17 (1 to 6); 18 (1 to 3, 4-5, 6); 19 (1 to 6); 20 (1, 3 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 7); 26 (1 to 7); 27 (1 to 7); 28 (1 to 7); 29 (1 to 7)
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Portico
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Preserved
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2026-04-02
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Preserved : 1997: 1(1-4), 1998: 2(1-4), 1999: 3(1-4), 2000: 4(1-4), 2001: 5(1-4), 2002: 6(1-4), 2003: 7(1-4), 2004: 8(1-4), 2005: 9(1-4), 2006: 10(1-6), 2007: 11(1-6), 2008: 12(1-6), 2009: 13(1-6), 2010: 14(1-6), 2011: 15(1-6), 2012: 16(1-6), 2013: 17(1-6), 2014: 18(1-6), 2015: 19(1-6), 2016: 20(1-6), 2017: 21(1-6), 2018: 22(1-6), 2019: 23(1-6), 2020: 24(1-6), 2021: 25(1-7), 2022: 26(1-7), 2023: 27(1-7), 2024: 28(1-7), 2025: 29(1-7)
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Portico
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Preserved
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2026-04-02
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Preserved : 1997: 1(1-4), 1998: 2(1-4), 1999: 3(1-4), 2000: 4(1-4), 2001: 5(1-4), 2002: 6(1-4)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 28
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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 29
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LOCKSS Archive
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In Progress
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2026-04-06
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29
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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 6); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 3, 4-5, 6); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 7); 26 (1 to 7); 27 (1 to 6); 28 (1 to 7); 29 (1, 2)
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Library of Congress
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Preserved
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2025-04-07
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14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 4-5, 6); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 7); 26 (1 to 7); 27 (1 to 7); 28 (1 to 6)
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