Internet Archive
1981-1996
Preserved
2025-08-08
30 to 45
Scholars Portal
1997-2022
Preserved
2025-09-02
Preserved : 46 (2 to 15); 47 (, 1 to 13); 48 (, 1 to 12); 49 (, 1 to 13); 50 (, 1 to 13); 51 (, 1 to 12); 52 (, 1 to 12); 53 (, 1 to 12); 54 (, 1 to 12); 55 (, 1 to 3 to 12); 56 (, 1 to 12); 57 (, 1 to 12); 58 (, 1 to 12); 59 (, 1 to 12); 60 (, 1 to 12); 61 (, 1 to 12); 62 (, 1 to 12); 63 (, 1 to 7, 8-9, 10 to 12); 64 (, 1 to 12); 65 (, 1 to 12); 66 (, 3, 4, 6, 9 to 12); 67 (, 2, 3, 6, 9, 11, 12); 68 (, 2, 7, 8, 11, 12); 69 (, 3 to 6, 8 to 11); 70 (, 1, 4, 5, 9, 10, 12); 71 (, 1, 4); 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022
Portico
1994-1994
Preserved
2026-02-12
Preserved : 1994: 43(12)
CLOCKSS Archive
1994-2022
Preserved
2026-02-09
43, 46 to 71
Portico
1997-2022
Preserved
2026-02-12
Preserved : 1997: 46(1-12), 1998: 47(1-12), 1999/2014: 48(1-12), 2000: 49(1-12), 2001: 50(1-12), 2002/2014: 51(1-12), 2003: 52(1-12), 2004: 53(1-12), 2005: 54(1-12), 2006: 55(1, S 1, 2-12), 2007: 56(1-12), 2008: 57(1-12), 2009: 58(1-12), 2010: 59(1-12), 2011: 60(1-12), 2012: 61(1-12), 2013: 62(1-12), 2014: 63(1-7, 11-12), 2015: 64(1, 3-12), 2016: 65(1, S 1, 2-12), 2017: 66(1-12), 2018: 67(1-12), 2019: 68(1-3, S 3, 4-12), 2020: 69(1-12), 2021: 70(1, S 1, 2-12), 2022: 71(1-5)
LOCKSS Archive
2012-2012
In Progress
2026-02-09
61
LOCKSS Archive
2013-2019
Preserved
2026-02-09
62 to 68
National Library of the Netherlands
1997-2019
Preserved
2024-12-15
Preserved : 46 (1-12); 47 (1-12); 48 (1-12); 49 (1-12); 50 (1-12); 51 (1-12); 52 (1-12); 53 (1-12); 54 (1-12); 55 (1-8, 11, 12); 56 (1, 2, 5-12); 57 (1-12); 58 (1-12); 59 (1-12); 60 (1-12); 61 (1-12); 62 (1-12); 63 (1-7, 8-9, 10-12); 64 (supplement-1, 1-12); 65 (supplement-1, 1-12); 66 (1-12); 67 (1-12); 68 (supplement-1, 1-11)
National Digital Preservation Program, China
1997-2024
Preserved
2025-10-23
Preserved : ; 5 (1 to 9, 11, 12); 6 (1 to 9, 11, 12); 7 (Suppl 1, 1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 7, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (Suppl 1, 1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (Suppl 2, 1 to 9, 11, 12); 72 (Suppl 1, 1 to 9, 11, 12); 73 (1 to 9, 11, 12)
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : ; 5 (1 to 9, 11, 12); 6 (1 to 9, 11, 12); 7 (Suppl 1, 1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 to 7, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (Suppl 1, 1 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (Suppl 2, 1 to 9, 11, 12); 72 (Suppl 1, 1 to 9, 11, 12); 73 (1 to 9, 11, 12)