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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, 2, 3-4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1-2, 3-4); 11 (1 to 4); 12-13; 12 (1, 2-3); 13 (3, 4); 14 (1 to 4); 15 (1 to 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); 22-23; 22 (1 to 3); 23 (1, 2-4); 24 (1-2, 3-4); 25 (1, 2); 26 (1, 2); 27 (1, 2); 28 (1, 2); 29 (1, 2); 30 (1, 2); 31 (1, 2); 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 40 (1, 2); 41 (1, 2); 42 (1 to 3); 43 (1, 2-3, 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (sup1, 1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (sup1, 1 to 6); 57 (sup1, 1 to 6); 58 (1)
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CLOCKSS Archive
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Preserved
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2026-04-27
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ahead-of-print to 57
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LOCKSS Archive
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Preserved
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2026-04-27
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1 to 57
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LOCKSS Archive
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In Progress
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2026-04-27
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58
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Portico
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Preserved
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2026-04-30
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Preserved : 1980: 12(4)
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Portico
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Preserved
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2026-04-30
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Preserved : 1991: 23(1)
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Portico
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Preserved
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2026-04-30
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Preserved : 1993: 25(1-2), 1994: 26(1-2), 1995: 27(1-2), 1996: 28(1-2), 1997: 29(1-2), 1998: 30(1-2), 1999: 31(1-2), 2000: 32(1-2), 2001: 33(1-2), 2002: 34(1-2), 2003: 35(1-2), 2004: 36(1-2), 2005: 37(1-2), 2006: 38(1-2), 2007: 39(1-2), 2008: 40(1-2), 2009: 41(1-2), 2010: 42(1-3), 2011: 43(1-4), 2012: 44(1-4), 2013: 45(1-4), 2014: 46(1-4), 2015: 47(1-4), 2016: 48(1-6), 2017: 49(1-6), 2018: 50(1-6), 2019: 51(1-6), 2020: 52(1-6), 2021: 53(1-6), 2022: 54(1-6), 2023: 55(1-6), 2024: 56(1, sup1, 1, 2-6), 2025: 57(1, sup1, 1, 2-6), 2026: 58(1-2)
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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 : 3 (1, 2); 4 (1, 2); 5 (1 to 6); 29 (1, 2); 31 (1, 2); 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 41 (1, 2); 42 (1 to 3); 43 (1, 2-3, 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 6); 49 (1 to 6); 51 (sup1, 1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (sup1, 1 to 6); 57 (1)
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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 : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1, 2, 3-4); 6 (1-4); 7 (1-4); 8 (1-4); 9 (1-4); 10 (1-2, 3-4); 11 (1-4); 12 (1, 2-3, 4); 13 (2-4); 14 (1-4); 15 (1-4); 16 (1-4); 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 (1-4); 23 (2-4); 24 (1-2, 3-4); 25 (1, 2); 26 (1, 2); 27 (1, 2); 28 (1, 2); 29 (1, 2); 30 (1, 2); 31 (1, 2); 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 40 (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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42 (1 to 3); 43 (1, 2-3, 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (sup1, 1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (sup1, 1 to 6)
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