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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 6); 4 (1 to 8); 5 (1 to 8); 6 (1 to 8); 7 (1 to 8); 8 (1 to 8); 9 (1 to 4, 5-6, 7, 8); 10 (1-2, 3 to 9); 11 (1 to 4, 5-6, 7 to 10); 12 (1 to 4, 5-6, 7 to 10); 13 (1 to 10); 14 (2-3, 4 to 10); 15 (S1, 1 to 9); 16 (S1, 1 to 9); 17 (S1, 1 to 9); 18 (1 to 10); 19 (1 to 10); 20 (1, 2, 3-4, 5 to 10); 21 (none, 1E, 2 to 6, 8 to 10); 22 (1E, 2 to 10); 23 (1E, 2 to 10); 24 (1, 2, 5 to 12); 25 (1 to 11); 26 (2 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1, 2, 3-4, 5 to 9, 11, 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 (1 to 12); 38 (1 to 3)
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Portico
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Preserved
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2026-04-02
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Preserved : 1989: 1(1-4), 1990: 2(1-4), 1991: 3(1-6), 1992: 4(1-8), 1993: 5(1-8), 1994: 6(1-8), 1995: 7(1-8), 1996: 8(1-8), 1997: 9(1-8), 1998: 10(1-9), 1999: 11(1-10), 2000: 12(1-10), 2001: 13(1-10), 2002: 14(1-10), 2003: 15(1, S 1, 2-9), 2004: 16(1, S 1, 2-9), 2005: 17(1, S 1, 2-9), 2006: 18(1-10), 2007: 19(1-10), 2008: 20(1-10), 2009: 21(1, S 1, 2-10), 2010: 22(1-10), 2011: 23(1-10), 2012: 24(1-12), 2013: 25(1-12), 2014: 26(1-12), 2015: 27(1-12), 2016: 28(1-12), 2017: 29(1-12), 2018: 30(1-12), 2019: 31(1-12), 2020: 32(1-12), 2021: 33(1-12), 2022: 34(1-12), 2023: 35(1-12), 2024: 36(1-12), 2025: 37(1-12), 2026: 38(1-3)
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CLOCKSS Archive
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Preserved
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2026-03-30
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3 to 38
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 1 (1‐2, 3 to 9); 2 (1, 2, 3‐4, 5 to 9); 3 (1 to 9, 11, 12); 8 (1 to 8); 9 (1 to 4, 5‐6, 7, 8); 11 (1 to 4, 5‐6, 7 to 9); 12 (1 to 4, 5‐6, 7 to 9); 13 (1 to 9); 14 (1, 2‐3, 4 to 9); 15 (S1, 1 to 9); 16 (S1, 1 to 9); 17 (S1, 1 to 9); 18 (1 to 9); 19 (1 to 9); 21 (1E, 2 to 9); 22 (1E, 2 to 9); 23 (1E, 2 to 9); 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, 2, 3-4, 5 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)
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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 (1‐2, 3 to 9); 2 (1, 2, 3‐4, 5 to 9); 3 (1 to 9, 11, 12); 8 (1 to 8); 9 (1 to 4, 5‐6, 7, 8); 11 (1 to 4, 5‐6, 7 to 9); 12 (1 to 4, 5‐6, 7 to 9); 13 (1 to 9); 14 (1, 2‐3, 4 to 9); 15 (S1, 1 to 9); 16 (S1, 1 to 9); 17 (S1, 1 to 9); 18 (1 to 9); 19 (1 to 9); 21 (1E, 2 to 9); 22 (1E, 2 to 9); 23 (1E, 2 to 9); 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, 2, 3-4, 5 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)
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Library of Congress
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Preserved
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2025-04-07
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25 (11); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1, 3-4, 5 to 12); 30 (1 to 4, 6 to 12); 31 (1 to 10, 12); 32 (1, 3 to 5, 7, 9 to 12); 33 (2 to 12); 34 (1 to 12); 35 (1, 9 to 11); 36 (3, 4)
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