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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 4); 5 (1 to 4); 6 (1 to 4); 7 (1, 2, 3-4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 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 9); 27 (1 to 9); 28 (1 to 9); 29 (1 to 9); 30 (Supplement:, 1 to 9); 31 (1 to 9); 32 (1 to 9); 33 (1 to 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (2 to 9); 40 (1 to 6, 8, 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 5, 7, 9); 44 (1 to 5, 7, 9); 45 (1, 3 to 9); 47 (none); 49; 50; 51; 93 (6)
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Internet Archive
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Preserved
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2025-08-08
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13 to 23
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Portico
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Preserved
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2026-04-23
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Preserved : 1974/1975: 1(1-4), 1976/1977: 2(1-4), 1978: 3(1-4), 1979: 4(1-4), 1980: 5(1-4), 1981: 6(1-4), 1982: 7(1-2), 1983/1984: 8(1-4), 1984: 9(1-4), 1985: 10(1-4), 1986: 11(1-4), 1987: 12(1-4), 1988: 13(1-4), 1989: 14(1-6), 1990: 15(1-6), 1991: 16(1-6), 1992: 17(1-6), 1993: 18(1-6), 1994: 19(1-6), 1995: 20(1-6), 1996: 21(1-6), 1997: 22(1-6), 1998: 23(1-4, 6), 1999: 24(1-6), 2000: 25(1-6), 2001: 26(1-9), 2002: 27(1-9), 2003: 28(1-9), 2004: 29(1-9), 2005: 30(1-9), 2006: 31(1-9), 2007: 32(1-9), 2008: 33(1-9), 2009: 34(1-9), 2010: 35(1-9), 2010/2011: 36(1-9), 2011/2012: 37(1-9), 2013: 38(1-9), 2013/2014: 39(1-9), 2015: 40(1-9), 2016: 41(1-9), 2017: 42(1-9), 2018: 43(1-9), 2019: 44(1-9), 2020: 45(1-9), 2021: 46, 2022: 47, 2023: 48, 2024: 49, 2025: 50, 2026: 51
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LOCKSS Archive
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Preserved
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2026-04-27
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30 to 49
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CLOCKSS Archive
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Preserved
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2026-04-27
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33 to 43, 51
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CLOCKSS Archive
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In Progress
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2026-04-27
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44 to 50
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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 (1 to 9); 5; 31 (1 to 9); 32 (1 to 9); 33 (1 to 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (1 to 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 9); 44 (1 to 9); 45 (1 to 9); 46; 47; 48; 49
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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 (1 to 9); 5; 31 (1 to 9); 32 (1 to 9); 33 (1 to 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (1 to 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 9); 44 (1 to 9); 45 (1 to 9); 46; 47; 48; 49
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 1 (3, 4); 2 (1, 4); 3; 4 (2, 3); 5 (4); 6 (3, 4); 7 (3-4); 8 (4); 9 (2-4); 10 (1-4); 11 (1, 3, 4); 12 (1, 4); 13 (1-4); 14 (1, 3); 15 (6); 16 (1-6); 17 (1-6); 18 (2-6); 19 (2-6); 20 (1-6)
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