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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 6); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1, 2-3, 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1, 3, 4); 18 (1 to 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 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); 37; 38 (2, 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 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 4, 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 4, 6); 61 (1 to 6); 62 (1 to 3, 5, 6); 63 (1 to 3, 5); 64 (1, 2); 65 (1, 4 to 6); 66 (1)
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Internet Archive
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Preserved
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2025-08-08
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29 to 53
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Portico
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Preserved
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2026-04-02
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Preserved : 1970: 10(1-3), 1971: 11(1-3), 1972: 12(1-3), 1973: 13(1-3), 1974: 14(1-3), 1975: 15(1-3), 1976: 16(1-3), 1977: 17(1-3), 1978: 18(1-3), 1979: 19(1-3), 1980: 20(1-3), 1981: 21(1-4), 1982: 22(1-4), 1983: 23(1-4), 1984: 24(1-4), 1985: 25(1-4), 1986: 26(1-4), 1987: 27(1-4), 1988: 28(1-4), 1989: 29(1-4), 1990: 30(1-4), 1991: 31(1-4), 1992: 32(1-4), 1993: 33(1-4), 1994: 34(1-2, 4), 1995: 35(1-4), 1996: 36(1-4), 1997: 37(1-4), 1998: 38(1-4), 1999: 39(1-3), 2000: 40(1-4), 2001: 41(1-4), 2002: 42(1-4), 2003: 43(1-4), 2004: 44(1-6), 2005: 45(1-6), 2006: 46(1-6), 2007: 47(1-6), 2008: 48(1-6), 2009: 49(1-6), 2010: 50(1-6), 2010/2011: 51(1-6), 2011/2012: 52(1-6), 2012/2013: 53(1-6), 2014: 54(1-6), 2014/2015: 55(1-6), 2015/2016: 56(1-6), 2015/2017: 57(1-6), 2018: 58(1-6), 2019: 59(1-6), 2020: 60(1-6), 2021: 61(1-6), 2022: 62(1-6), 2023: 63(1-6), 2024: 64(1-6), 2025: 65(1-6), 2026: 66(1-2)
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CLOCKSS Archive
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Preserved
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2026-03-30
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56 to 58
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LOCKSS Archive
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Preserved
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2026-03-30
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|
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56 to 65
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CLOCKSS Archive
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In Progress
|
2026-03-30
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|
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59 to 65
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|
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LOCKSS Archive
|
|
In Progress
|
2026-03-30
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|
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66
|
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LOCKSS Archive
|
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Preserved
|
2026-03-30
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45 to 55
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|
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CLOCKSS Archive
|
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Preserved
|
2026-03-30
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|
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48 to 55
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Scholars Portal
|
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Preserved
|
2026-03-19
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|
|
Preserved :
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|
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National Digital Preservation Program, China
|
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Preserved
|
2025-10-23
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|
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Preserved : 5 (1 to 6); 6 (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 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (2, 5, 6); 64 (1, 2, 4 to 6); 65 (1 to 4)
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National Digital Preservation Program, China
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|
Preserved
|
2025-12-04
|
|
|
Preserved : 5 (1 to 6); 6 (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 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (2, 5, 6); 64 (1, 2, 4 to 6); 65 (1 to 6)
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|
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National Digital Preservation Program, China
|
|
Preserved
|
2025-12-04
|
|
|
Preserved : 6
|
|
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National Library of the Netherlands
|
|
Preserved
|
2024-12-15
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|
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Preserved : 1 (1, 3); 2 (1, 3, 4); 3 (2-4); 4 (1-6); 5 (1-4); 6 (2-4); 7 (1-4); 8 (2-4); 9 (1, 3, 4); 10 (1, 2-3, 4); 11 (2-4); 12 (1-4); 13 (2-4); 14 (1-4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1, 2, 4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4)
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