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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 12); 2 (1 to 12); 3 (1 to 12); 4 (1 to 12); 5 (1 to 12); 6 (1 to 12); 7 (1 to 12); 8 (1 to 12); 9 (1 to 12); 10 (1 to 12); 11 (1 to 12); 12 (1 to 12); 13 (1 to 12); 14 (1 to 12); 15 (1 to 12); 16 (1 to 12); 17 (1 to 12); 18 (1 to 12); 19 (1 to 12); 20 (1 to 12); 21 (1 to 12); 22 (1 to 12); 23 (1 to 12); 24 (1 to 12); 25 (1 to 12); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1 to 12); 30 (1 to 12); 31 (1 to 12); 32 (1 to 6); 33 (1 to 6); 34 (1 to 8, 9-10, 11, 12); 35 (1 to 12); 36 (1 to 8, 9-10, 11-12); 37 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 38 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 39 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 40 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 41 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 42 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 43 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 44 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 45 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 46 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 47 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 48 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 49 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 50 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 51 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 52 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 53 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 55 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 56 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 57 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 58 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 59 (1-2, 3-4, 5-6, 7-8)
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Internet Archive
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Preserved
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2025-08-08
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to 12
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LOCKSS Archive
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In Progress
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2026-04-06
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 59
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Portico
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Preserved
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2026-04-09
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Preserved : 1966: 2(5), 1967: 3(2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1972: 8(11-12)
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Portico
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Preserved
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2026-04-09
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Preserved : 1974: 10(2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1975: 11(5)
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Portico
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Preserved
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2026-04-09
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Preserved : 1982: 18(8)
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Portico
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Preserved
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2026-04-09
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Preserved : 1989: 25(2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1990: 26(5)
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Portico
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Preserved
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2026-04-09
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Preserved : 1993: 29(12), 1994: 30(9)
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Portico
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Preserved
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2026-04-09
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Preserved : 1995: 31(12), 1996: 32(5), 1997: 33(1-6), 1998: 34(1-12), 1999: 35(1-12), 2000: 36(1-7, 9-12), 2001: 37(1-12), 2002: 38(1-12), 2003: 39(1-12), 2004: 40(1-12), 2005: 41(1-12), 2006: 42(1-12), 2007: 43(1-12), 2008: 44(1-12), 2009: 45(1-12), 2010: 46(1-8), 2011: 47(1-8), 2012/2013: 48(1-4, 7-12), 2013/2014: 49(1-12), 2014/2015: 50(1-8, 11-12), 2015/2016: 51(1-12), 2016/2017: 52(1-12), 2017/2018: 53(1-12), 2018/2019: 54(1-12), 2019/2020: 55(1-12), 2020/2021: 56(1-12), 2021/2022: 57(1-12), 2022/2023: 58(1-12), 2023: 59(1-8)
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Library of Congress
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Preserved
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2025-04-07
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53 (11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 55 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 56 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 57 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 58 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 59 (1-2, 3-4, 5-6, 7-8)
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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 : 4 (1, 3, 5, 7, 9, 11); 5 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 33 (1 to 6); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 7, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11); 41 (1, 3, 5, 7, 9, 11); 42 (1, 3, 5, 7, 9, 11); 43 (1, 3, 5, 7, 9, 11); 44 (1, 3, 5, 7, 9, 11); 45 (1, 3, 5, 7, 9, 11); 46 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 47 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 48 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 49 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 51 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 52 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 53 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 55 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 56 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 57 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 58 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 59 (1-2, 3-4)
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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 (1, 3, 5, 7, 9, 11); 5 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 33 (1 to 6); 34 (1 to 9, 11, 12); 35 (1 to 9, 11, 12); 36 (1 to 7, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11); 41 (1, 3, 5, 7, 9, 11); 42 (1, 3, 5, 7, 9, 11); 43 (1, 3, 5, 7, 9, 11); 44 (1, 3, 5, 7, 9, 11); 45 (1, 3, 5, 7, 9, 11); 46 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 47 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 48 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 49 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 51 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 52 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 53 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 55 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 56 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 57 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 58 (1-2, 3-4, 5-6, 7-8, 9-1, 11-12); 59 (1-2, 3-4)
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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 : 45 (11); 46 (1, 3, 5, 7, 9, 11); 47 (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 : 45 (11); 46 (1, 3, 5, 7, 9, 11); 47 (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 : 33 (5); 36 (8, 9, 11); 37 (1, 3, 5, 7, 9, 11); 38 (1, 3, 5, 7, 9, 11); 39 (1, 3, 5, 7, 9, 11-12); 40 (1, 3, 5, 7, 9-10, 11); 41 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 42 (1, 3-4, 5-6, 7-8, 9-10, 11-12); 43 (3-4, 5-6, 7-8, 9-10, 11-12); 44 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 45 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 46 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 47 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 48 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 49 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 50 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 51 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 52 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 53 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 54 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 55 (1-2, 3-4)
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