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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 6 (2 to 6); 7 (1 to 6); 8 (1 to 6); 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 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 7); 58 (1 to 7); 59 (1 to 7); 60 (1 to 7); 61 (1 to 7); 62 (1, 2, 4 to 7); 63 (1 to 7); 64 (1 to 4, 6); 65 (1 to 6); 66 (1 to 5)
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Internet Archive
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Preserved
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2025-08-08
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to 35
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CLOCKSS Archive
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Preserved
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2026-04-06
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6 to 66
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Portico
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Preserved
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2026-04-02
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Preserved : 1965: 6(3)
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Portico
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Preserved
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2026-04-02
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Preserved : 1968: 9(5)
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Portico
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Preserved
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2026-04-02
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Preserved : 1971: 12(3)
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Portico
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Preserved
|
2026-04-02
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Preserved : 1978: 19(3)
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Portico
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Preserved
|
2026-04-02
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Preserved : 1984: 25(4, 6)
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Portico
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Preserved
|
2026-04-02
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Preserved : 1992: 33(2)
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Portico
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Preserved
|
2026-04-02
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Preserved : 1997: 38(1)
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Portico
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Preserved
|
2026-04-02
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Preserved : 1999: 40(1, 4-5)
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Portico
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Preserved
|
2026-04-02
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Preserved : 2006: 47(5-6), 2007: 48(3), 2008: 49(1, 3), 2009: 50(1)
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LOCKSS Archive
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In Progress
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2026-04-06
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53, 60
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Portico
|
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Preserved
|
2026-04-02
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Preserved : 2012: 53(6), 2013: 54(1-6), 2014: 55(1-5), 2015: 56(1, 3-6), 2016: 57(1-7), 2017: 58(1-7), 2018: 59(1-7), 2019/2020: 60(1-7), 2020: 61(1-7), 2021: 62(1-7), 2022: 63(1-7), 2023: 64(1-6), 2024: 65(1-6), 2025: 66(1-6)
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LOCKSS Archive
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Preserved
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2026-04-06
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54 to 59
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Library of Congress
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Preserved
|
2025-04-07
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58 (6, 7); 59 (1 to 7); 60 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 6); 65 (1)
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National Digital Preservation Program, China
|
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Preserved
|
2025-10-23
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|
|
Preserved : 4 (1 to 6); 5 (1 to 6); 6 (1 to 7); 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 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 7); 58 (1 to 7); 59 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 4); 65 (1 to 4)
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National Digital Preservation Program, China
|
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Preserved
|
2025-12-04
|
|
|
Preserved : 4 (1 to 6); 5 (1 to 6); 6 (1 to 7); 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 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 7); 58 (1 to 7); 59 (1 to 7); 61 (1 to 7); 62 (1 to 7); 63 (1 to 7); 64 (1 to 4); 65 (1 to 4)
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|
National Digital Preservation Program, China
|
|
Preserved
|
2025-10-23
|
|
|
Preserved : 5 (1); 49 (4, 5); 51 (2 to 6); 52 (1, 2)
|
|
|
National Digital Preservation Program, China
|
|
Preserved
|
2025-12-04
|
|
|
Preserved : 5 (1); 49 (4, 5); 51 (2 to 6); 52 (1, 2)
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|
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National Library of the Netherlands
|
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Preserved
|
2024-12-15
|
|
|
Preserved : 36 (C); 41 (6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-5); 49 (1-6); 50 (1-6); 51 (1-6); 52 (1-6); 53 (1-6); 54 (1-6); 55 (1-6); 56 (1-6); 57 (1-7); 58 (1-7); 59 (1-7); 60 (1-4)
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