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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); 2; 3 (2 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 8); 12 (1 to 8); 13 (1 to 8); 14 (1 to 10); 15 (1 to 10); 16 (1 to 10); 17 (5); 20 (3, 10); 23 (1 to 12); 24 (1 to 12); 25 (1 to 5, 10 to 12); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1 to 3, 5, 7 to 12); 30 (1 to 12); 31 (1 to 12); 32 (1 to 12); 33 (1 to 12); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (4 to 12); 38 (1 to 12); 39 (1 to 3)
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Internet Archive
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Preserved
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2025-08-08
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1 to 21
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Portico
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Preserved
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2026-04-09
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Preserved : 1989: 2(1), 1990: 3(1-4), 1991: 4(1-4), 1992: 5(1-4), 1993: 6(1-4), 1994: 7(1-6), 1995: 8(1-6), 1996: 9(1-6), 1997: 10(1-6), 1998: 11(1-8), 1999: 12(1-8), 2000: 13(1-8), 2001: 14(1-10), 2002: 15(1-10), 2003: 16(1-10), 2004: 17(1-10), 2004/2005: 18(1-10), 2006: 19(1-10), 2007: 20(1-10), 2008: 21(1-10), 2008/2009: 22(1-10), 2010: 23(1-12), 2011: 24(1-12), 2012: 25(1-12), 2013: 26(1-12), 2014: 27(1-12), 2015: 28(1-12), 2016: 29(1-12), 2017: 30(1-12), 2018: 31(1-12), 2019: 32(1-12), 2020: 33(1-12), 2021: 34(1-12), 2022: 35(1-12), 2023: 36(1-12), 2024: 37(1-12), 2025: 38(1-12), 2026: 39(1-3)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 37
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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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38, 39
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Library of Congress
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Preserved
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2025-04-07
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29 (1); 30 (4 to 12); 31 (1 to 12); 32 (1 to 12); 33 (1 to 12); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (1 to 11); 38 (1)
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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); 3 (1 to 9, 11, 12); 11 (1 to 8); 12 (1 to 8); 13 (1 to 8); 14 (1 to 9); 15 (1 to 9); 16 (1 to 9); 17 (1 to 9); 18 (1 to 9); 19 (1 to 9); 21 (1 to 9); 22 (1 to 9); 23 (1 to 9, 11, 12); 24 (1 to 9, 11, 12); 25 (1 to 9, 11, 12); 26 (1 to 9, 11, 12); 27 (1 to 9, 11, 12); 28 (1 to 9, 11, 12); 29 (1 to 9, 11, 12); 31 (1 to 9, 11, 12); 32 (1 to 9, 11, 12); 33 (1 to 9, 11, 12); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12); 37 (1 to 9, 11, 12); 38 (1 to 5)
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