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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 to 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (S1, 1 to 4); 24 (1 to 6); 25 (1 to 6); 26 (1, 2, 3-4, 5-6); 27 (1-2, 3, 4-5, 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 4, 5-6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 4, 5-6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 ((4), 1 to 6); 44 (1, 2-3, 4 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (2 to 6); 56 (2 to 6); 57 (1 to 4, 5-6); 58 (1, 2-6); 59 (1-2, 3-4, 5, 6); 60 (1-3, 4-6)
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Portico
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Preserved
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2026-04-23
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Preserved : 1978: 5(1-2, 4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1981: 11(4), 1982: 12(4)
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Portico
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Preserved
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2026-04-23
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Preserved : 2004: 39(2-6)
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Portico
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Preserved
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2026-04-23
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Preserved : 2008: 43(5)
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Portico
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Preserved
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2026-04-23
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Preserved : 2009: 44(6), 2010: 45(1-6), 2011: 46(1-6), 2012: 47(1-6), 2013: 48(1-6), 2013/2014: 49(1-6), 2014: 50(1-3)
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LOCKSS Archive
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Preserved
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2026-04-13
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24 to 59
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CLOCKSS Archive
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Preserved
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2026-04-13
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ahead-of-print, 24 to 60
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LOCKSS Archive
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In Progress
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2026-04-13
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60
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Portico
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Preserved
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2026-04-23
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Preserved : 1991: 26(1-4), 1992: 27(3, 6), 1993: 28(1-6), 1994: 29(1-6), 1995: 30(1-6), 1996: 31(1-4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1997: 32(1-6), 1998: 33(1-6), 1999: 34(1-6), 2000: 35(1-6), 2001: 36(1-6), 2002: 37(1-6), 2003: 38(1-6), 2004: 39(1-6), 2005: 40(1-6), 2006: 41(1-6), 2007: 42(1-6), 2008: 43(1-6), 2009: 44(1, 4-6), 2010: 45(1-6), 2011: 46(1-6), 2012: 47(1-6), 2013: 48(1-6), 2014: 49(1-6), 2015: 50(1-6), 2016: 51(1-6), 2017: 52(1-6), 2018: 53(1-6), 2019: 54(1-6), 2020: 55(1-6), 2021: 56(1-6), 2022: 57(1-6), 2023: 58(1-6), 2024: 59(1-6), 2025: 60(1-6)
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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 : 4 (2 to 6); 5 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 4, 5-6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1, 2-3, 4 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 4, 5-6); 58 (1, 2-6); 59 (1-2, 3-4, 5)
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Library of Congress
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Preserved
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2025-04-07
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45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 5-6); 58 (1, 2-6); 59 (1-2, 3-4, 5)
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