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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 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 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 (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 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1, 3 to 6); 47 (1, 3 to 6); 48 (1 to 6); 49 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 32
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LOCKSS Archive
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Preserved
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2026-04-13
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1 to 34
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 49
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Portico
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Preserved
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2026-04-16
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Preserved : 1981: 4(1), 1982: 5(1)
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Portico
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Preserved
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2026-04-16
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Preserved : 1985: 8(2)
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Portico
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Preserved
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2026-04-16
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Preserved : 1996: 19(6)
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Portico
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Preserved
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2026-04-16
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Preserved : 2005: 28(4-6), 2006: 29(1-3, 5), 2007: 30(5), 2008: 31(1-6), 2009: 32(1-6), 2010: 33(1-6), 2011: 34(1-6), 2012: 35(2-4), 2013: 36(1-6), 2014: 37(1-6), 2015: 38(1-6), 2016: 39(1-6), 2017: 40(1-6), 2018: 41(1-6), 2019: 42(1-6), 2019/2020: 43(1-6), 2021: 44(1-6), 2022: 45(1-6), 2023: 46(1-6), 2024: 47(1-6), 2025: 48(1-6), 2026: 49(1)
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Library of Congress
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Preserved
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2025-04-07
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39 (2, 6); 40 (6); 41 (2 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1-2, 3 to 6); 47 (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); 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 (1-2, 3 to 6); 47 (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); 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 (1-2, 3 to 6); 47 (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 : 20 (1-6); 21 (1-6); 22 (1-6); 23 (1-6); 24 (1-6); 25 (1-6); 26 (1-6); 27 (1-6); 28 (1-6); 29 (1-6); 30 (1, 3-6); 31 (1-6); 32 (1-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6)
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