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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, 2 to 4); 4 (1, 2_Part_1, 4); 5 (1_Part_1, 2, 4); 6 (1, 2 to 4); 7 (1, 3_Part_2, 4); 8 (1_Part_2, 2, 4); 9 (1, 3_Part_2); 10 (2, 4_Part_2); 11 (1_Part_2); 12 (3_Part_2, 4); 13 (1, 2 to 4); 14 (1 to 4 to 6); 15 (2 to 4 to 6); 16 (1_Part_2, 2 to 6); 17 (1 to 4 to 6); 18 (1 to 4 to 6); 19 (1 to 4 to 6); 20 (1, 2 to 4, 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 (Suppl, 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); 42 (2, 3); 43 (Supplement, 1 to 6); 44 (1 to 6); 45 (Supplement, 1 to 6); 46 (1 to 6); 47 (Supplement, 1 to 6); 48 (Supplement, 1 to 6); 49 (S1, 1 to 6); 50 (Supplement, 1 to 6); 51 (Supplement, 1 to 6); 52 (S1, 1 to 6); 53 (S1, 1 to 6); 54 (Suppl_1, 1 to 6); 55 (Suppl_1, 1 to 6); 56 (Suppl_3, 1 to 6); 57 (suppl_1, 1 to 6); 58 (suppl_1, 1 to 3, 5, 6); 59 (Supplement_1, 1, 2, 4 to 6); 60 (Supplement_1, 1 to 8); 61 (1, 3 to 8); 62 (1 to 10); 63 (1 to 6, 8, 9); 64 (1 to 7, 10 to 12); 65 (Supplement_1, 1 to 3, 5, 7 to 12); 66 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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1 to 54
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Portico
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Preserved
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2026-04-23
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Preserved : 1981: 21(1-5, Special Issue ial_Issue), 1982: 22(1-5), 1983: 23(1-5), 1984: 24(1-5), 1985: 25(1-5), 1986: 26(1-5), 1987: 27(1-5), 1988: 28(1-5, S), 1989: 29(1-5), 1990: 30(1-5), 1991: 31(1-5), 1992: 32(1-5), 1993: 33(1-5), 1994: 34(1-5), 1995: 35(1-5), 1996: 36(1-5), 1997: 37(1-5), 1998: 38(1-5), 1999: 39(1-5), 2000: 40(1-6, Special Issue ial_Issue_I), 2001: 41(1-5), 2002: 42(1, Special Issue ial_Issue_1, 2-6), 2003: 43(1-5), 2004: 44(1-6), 2005: 45(1-5), 2006: 46(1-6), 2007: 47(1-6), 2008: 48(1-6), 2009: 49(1, S 1, 2-6), 2010: 50(1-6), 2010/2011: 51(1-6), 2012: 52(1, S 1, 2-6), 2012/2013: 53(1, S 1, 2-6), 2013/2014: 54(1-6), 2014/2015: 55(1-6), 2014/2015/2016: 56(1-6), 2017: 57(1-6), 2018: 58(1-6), 2019: 59(1-6), 2020: 60(1-8), 2021: 61(1-8), 2022: 62(1-10), 2023: 63(1-10), 2024: 64(1-12), 2025: 65(1-12), 2026: 66(1-5)
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LOCKSS Archive
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Preserved
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2026-04-27
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48, 50 to 64
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CLOCKSS Archive
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In Progress
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2026-04-27
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48, 59 to 65
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CLOCKSS Archive
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Preserved
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2026-04-27
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49 to 58, 65, 66
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LOCKSS Archive
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In Progress
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2026-04-27
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65, 66
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 65 (8, 9)
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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 : ; 4 (6); 5 (suppl_1, 1 to 6); 6 (Supplement_1, 1 to 8); 42 (Special_Issue_1); 44 (1); 47 (5); 49 (S1, 1 to 6); 51 (suppl_1, 1 to 6); 52 (S1, 1 to 6); 53 (S1, 1 to 6); 54 (Suppl_1, 1 to 6); 55 (Suppl_1, 1 to 6); 56 (Suppl_1, 1 to 6); 57 (suppl_1, 1 to 6); 58 (suppl_1, 1 to 6); 59 (Supplement_1, 1 to 6); 61 (1 to 8); 62 (1 to 9); 63 (1 to 3, 5 to 9); 64 (1 to 9, 11, 12); 65 (1 to 8)
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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 : ; 4 (6); 5 (suppl_1, 1 to 6); 6 (Supplement_1, 1 to 8); 42 (Special_Issue_1); 44 (1); 47 (5); 49 (S1, 1 to 6); 51 (suppl_1, 1 to 6); 52 (S1, 1 to 6); 53 (S1, 1 to 6); 54 (Suppl_1, 1 to 6); 55 (Suppl_1, 1 to 6); 56 (Suppl_1, 1 to 6); 57 (suppl_1, 1 to 6); 58 (suppl_1, 1 to 6); 59 (Supplement_1, 1 to 6); 61 (1 to 8); 62 (1 to 9); 63 (1 to 3, 5 to 9); 64 (1 to 9, 11, 12); 65 (1 to 9, 11)
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British Library
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Preserved
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2019-09-18
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Preserved : 54 (1 to 4; 6; S2), 55 (1 to 5; S1), 56 (1 to 5; S1 to S2; S 3), 57 (1 to 2), 58 (1; 3 to 6), 59 (2)
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