Scholars Portal
1967-2025
Preserved
2026-03-19
Preserved : 1 (2 to 6); 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 5 (1 to 6); 6 (1 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 5); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1 to 4); 24 (1, 2-4); 25 (1, 2); 26 (1-2); 27 (2); 28 (1, 2, 3-4); 29 (1, 2-3, 4); 30 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 3, 4-5); 41 (1, 2, 3-4, 5); 42 (1 to 3, 4-5); 43 (1, 2, 3-4, 5); 44 (1 to 5); 45 (1-2, 3 to 5); 46 (1, 5); 47 (1 to 3, 4-5); 48 (1 to 5); 49 (1-2, 3 to 5); 50 (1 to 3, 4-5); 51 (1, 2, 3-4, 5); 52 (1, 2-3, 4, 5); 53 (1 to 5); 54 (1-2, 3 to 5); 55 (1 to 5); 56 (1, 2-3, 4-5); 57 (1-2, 3, 4-5); 58 (1, 2-3, 4-5); 59 (1)
Internet Archive
1980-2000
Preserved
2025-08-08
14 to 34
LOCKSS Archive
1967-2024
Preserved
2026-04-06
1 to 58
CLOCKSS Archive
1967-2025
Preserved
2026-04-06
ahead-of-print to 59
LOCKSS Archive
2025-2025
In Progress
2026-04-06
59
Portico
1990-1991
Preserved
2026-04-09
Preserved : 1990: 24(1), 1991: 25(1-2)
Portico
1993-2025
Preserved
2026-04-09
Preserved : 1993: 27(1-2), 1994: 28(1-2), 1995: 29(1, 4), 1996: 30(1-4), 1997: 31(1-4), 1998: 32(1-4), 1999: 33(1-4), 2000: 34(1-4), 2001: 35(1-4), 2002: 36(1-4), 2003: 37(1-4), 2004: 38(1-4), 2005: 39(1-4), 2006: 40(1-3), 2007: 41(1-2, 5), 2008: 42(1-5), 2009: 43(1-5), 2010: 44(1-5), 2011: 45(1-5), 2012: 46(1-5), 2013: 47(1-5), 2014: 48(1-5), 2015: 49(1-5), 2016: 50(1-5), 2017: 51(1-5), 2018: 52(1-5), 2019: 53(1-5), 2020: 54(1-5), 2021: 55(1-5), 2022: 56(1-5), 2023: 57(1-5), 2024: 58(1-5), 2025: 59(1)
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : 4 (2, 3, 4-5); 5 (1 to 3, 4-5); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1, 2, 3-4, 5); 42 (1 to 3, 4-5); 43 (1, 2, 3-4, 5); 44 (1 to 5); 45 (1-2, 3 to 5); 46 (1, 2, 3-4, 5); 47 (1 to 3, 4-5); 48 (1 to 5); 49 (1-2, 3 to 5); 51 (1, 2, 3-4, 5); 52 (1, 2-3, 4, 5); 53 (1 to 5); 54 (1-2, 3 to 5); 55 (1 to 5); 56 (1, 2-3, 4-5); 57 (1-2, 3, 4-5); 58 (1)
Library of Congress
2010-2023
Preserved
2025-04-07
44 (1 to 5); 45 (1-2, 3 to 5); 46 (1 to 3-4, 5); 47 (1 to 4-5); 48 (1 to 5); 49 (1-2, 3 to 5); 50 (1 to 4-5); 51 (1 to 3-4, 5); 52 (1, 2-3, 4, 5); 53 (1 to 5); 54 (1-2, 3 to 5); 55 (1 to 5); 56 (1, 2-3, 4-5); 57 (1-2, 3, 4-5)