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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (2, 3, 4-5); 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 (1-2, 3, 4); 10 (1 to 4); 11 (1 to 4); 12 (1, 2-4); 13 (1, 2, 3-4); 14 (1, 2-3, 4); 15 (1-2, 3, 4); 16 (1-2, 3, 4); 17 (1, 2-3, 4); 18 (1-2, 3 to 6); 19 (1-2, 3, 4, 5-6); 20 (1 to 6); 21 (1 to 3, 4-5, 6); 22 (1, 2, 3-4, 5, 6); 23 (1, 2-3, 4, 5-6); 24 (1, 2, 3-4, 5, 6); 25 (1-2, 3, 4 to 6); 26 (1 to 6); 27 (1, 2-3, 4 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (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 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1, 2)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 45
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Portico
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Preserved
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2026-04-09
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Preserved : 1960/1961: 1(1-5), 1961/1962/1963: 2(1-4), 1963/1964: 3(1-4), 1965/1966: 4(1-4), 1967: 5(1-4), 1968/1969: 6(1-4), 1969/1970/1972: 7(1-4), 1973/1974: 8(1-4), 1975/1976/1979: 9(1-4), 1990/1991: 10(1-4), 1991/1992/1993: 11(1-4), 1993: 12(1-4), 1994: 13(1-4), 1995: 14(1-4), 1996: 15(1-4), 1997: 16(1-4), 1998: 17(1-4), 1999: 18(1-6), 2000: 19(1-6), 2001: 20(1-6), 2002: 21(1-6), 2003: 22(1-6), 2004: 23(1-6), 2005: 24(1-6), 2006: 25(1-6), 2007: 26(1-6), 2008: 27(1-6), 2009: 28(1-6), 2010: 29(1-6), 2011: 30(1-6), 2012: 31(1-6), 2013: 32(1-5), 2014: 33(1-5), 2015: 34(2-6), 2016: 35(1-6), 2017: 36(1-6), 2018: 37(1-6), 2019: 38(1-6), 2019/2020: 39(1-6), 2021: 40(1-6), 2022: 41(1-6), 2023: 42(1-6), 2024: 43(1-5), 2025: 44(1-6), 2026: 45(1-2)
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LOCKSS Archive
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In Progress
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2026-04-06
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31, 38
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LOCKSS Archive
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Preserved
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2026-04-06
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32 to 37
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Library of Congress
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Preserved
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2025-04-07
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37 (2 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 5)
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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 : 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 16 (1, 3, 4); 17 (1, 2, 4); 18 (1, 3 to 6); 19 (1, 3 to 5); 21 (1 to 4, 6); 22 (1 to 3, 5, 6); 23 (1, 2, 4, 5); 24 (1 to 3, 5, 6); 25 (1, 3 to 6); 26 (1 to 6); 27 (1, 2, 4 to 6); 28 (1 to 6); 29 (1 to 6); 31 (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 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 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 : 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 16 (1, 3, 4); 17 (1, 2, 4); 18 (1, 3 to 6); 19 (1, 3 to 5); 21 (1 to 4, 6); 22 (1 to 3, 5, 6); 23 (1, 2, 4, 5); 24 (1 to 3, 5, 6); 25 (1, 3 to 6); 26 (1 to 6); 27 (1, 2, 4 to 6); 28 (1 to 6); 29 (1 to 6); 31 (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 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6)
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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 : 16 (1, 3, 4); 17 (1, 2, 4); 18 (1, 3-6); 19 (1, 3-5); 20 (1-6); 21 (1-4, 6); 22 (1-3, 6); 23 (1, 2, 5); 24 (1, 2, 3-4, 5, 6); 25 (1-2, 3, 4-6); 26 (1-6); 27 (1, 2-3, 4-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6)
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