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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; 4; 5; 6 (2 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1); 11; 12 (2 to 4); 13 (1 to 4); 14 (1); 15; 16 (2 to 4); 17 (1 to 4); 18 (1 to 4); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (s01, 1 to 6); 27 (1 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 (2, 4 to 6); 44 (1 to 6); 45 (1 to 6); 46 (Suppl, 1 to 6); 47 (Suppl, 1 to 6); 48 (Suppl, 1, 2, 5 to 24); 49 (Suppl, 1 to 24); 50 (1 to 3)
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LOCKSS Archive
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In Progress
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2026-04-13
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36, 43
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LOCKSS Archive
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Preserved
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2026-04-13
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37 to 42
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Internet Archive
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Preserved
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2025-08-08
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5 to 20
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Portico
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Preserved
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2026-04-16
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Preserved : 1976: 1(1), 1978: 2(1)
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 50
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Portico
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Preserved
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2026-04-16
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Preserved : 1980: 4(1)
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Portico
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Preserved
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2026-04-16
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Preserved : 1982: 6(3)
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Portico
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Preserved
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2026-04-16
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Preserved : 1983: 7(4)
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Portico
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Preserved
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2026-04-16
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Preserved : 1986: 10(1), 1987: 11(1), 1988: 12(1, 4), 1989: 13(4), 1990: 14(1), 1991: 15(1), 1992: 16(1), 1993: 17(2-4), 1994: 18(2)
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Portico
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Preserved
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2026-04-16
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Preserved : 1995: 19(3-4), 1996/2004: 20(3-5), 1997: 21(1-6), 1998: 22(1-6), 1999: 23(1-6), 2000: 24(1-6), 2001: 25(1-6), 2002: 26(1-3, 5-6), 2003: 27(1-6), 2004: 28(1-6), 2005: 29(1-6), 2006: 30(1-6), 2007: 31(1-6), 2008: 32(1-6), 2009: 33(1-6), 2010: 34(1-6), 2011: 35(1-6), 2012: 36(1-6), 2013: 37(1-6), 2014: 38(1-6), 2015: 39(1-6), 2016: 40(1-6), 2017: 41(1-6), 2018: 42(1-6), 2019: 43(1-6), 2019/2020: 44(1-6), 2021: 45(1-6), 2022: 46(1, S 1, 2-6), 2023: 47(1, S 1, 2, S 2, 3-6), 2024: 48(1, S 1, 2-20, 22-24), 2025: 49(1, S 1, 2-3, 5-24), 2026: 50(1-6)
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Library of Congress
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Preserved
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2025-04-07
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42 (2 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (S1, 1 to 6); 47 (1, S1, S2, 2 to 6); 48 (1, S1, 2 to 18)
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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 (5); 3 (1 to 6); 4 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 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); 44 (1 to 6); 45 (1 to 6); 46 (Suppl 1, 1 to 6); 47 (Suppl 2, 1 to 6); 48 (Suppl 1, 1 to 9, 11 to 19, 21 to 24)
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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 (5); 3 (1 to 6); 4 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 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); 44 (1 to 6); 45 (1 to 6); 46 (Suppl 1, 1 to 6); 47 (Suppl 2, 1 to 6); 48 (Suppl 1, 1 to 9, 11 to 19, 21 to 24)
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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 : 21 (4); 22 (2, 3, 6); 23 (5, 6); 24 (1, 4-6); 25 (1, 3, 5, 6); 26 (2-6); 27 (2-6); 28 (1-6); 29 (1-6); 30 (1-6); 31 (1, 4-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-5); 78 (4)
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