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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 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 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 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); 40 (1 to 9); 41 (1 to 9); 42 (1 to 9); 43 (1 to 9); 44 (1 to 9); 45 (1 to 9); 46 (1 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 50 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 9); 55 (1 to 9); 56 (1, 2)
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Internet Archive
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Preserved
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2025-08-08
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5 to 28
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Portico
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Preserved
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2026-05-28
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Preserved : 1972: 5(1-4), 1973: 6(1-4), 1976: 7(1-4), 1977: 8(1-4), 1978: 9(1-4), 1980: 10(1-6), 1981: 11(1-6), 1982: 12(1-6), 1983: 13(1-6), 1984: 14(1-6), 1985: 15(1-6), 1986: 16(1-6), 1987: 17(1-6), 1988: 18(1-6), 1989: 19(1-6), 1990: 20(1-6), 1991: 21(1-6), 1992: 22(1-6), 1993: 23(1-6), 1994: 24(1-6), 1995: 25(1-6), 1996: 26(1-6), 1997: 27(1-6), 1998: 28(1-6), 1999: 29(1-6), 2000: 30(1-6), 2001: 31(1-6), 2002: 32(1-6), 2003: 33(1-9), 2004: 34(1-9), 2005: 35(1-9), 2006: 36(1-9), 2007: 37(1-9), 2008: 38(1-9), 2009: 39(1-9), 2010: 40(1-9), 2011: 41(1-9), 2012: 42(1-6, 9), 2013: 43(1-7, 9), 2014: 44(1-7), 2015: 45(3-9), 2016: 46(1-9), 2017: 47(1-9), 2018: 48(1-9), 2019: 49(1-9), 2019/2020: 50(1-9), 2021: 51(1-9), 2022: 52(1-6, 8-9), 2023: 53(1-9), 2024: 54(1-7, 9), 2025: 55(2-9), 2026: 56(1-2, 4)
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LOCKSS Archive
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In Progress
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2026-05-25
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42, 49
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LOCKSS Archive
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Preserved
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2026-05-25
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43 to 48
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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 : 3 (1 to 6); 4 (1 to 9); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 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)
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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 : 3 (1 to 6); 4 (1 to 9); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 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)
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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 : 3 (1 to 6); 4 (1 to 9); 5 (1 to 9); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 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 (1 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 9)
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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 : 3 (1 to 6); 4 (1 to 9); 5 (1 to 9); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 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 (1 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 9)
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Library of Congress
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Preserved
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2025-04-07
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48 (2 to 9); 49 (1 to 9); 50 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 6)
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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 : 14 (6); 30; 31 (1-6); 32 (1-6); 33 (1-9); 34 (1-9); 35 (1-9); 36 (1-8); 37 (1-3, 5-9); 38 (1-9); 39 (1-8); 40 (1-9); 41 (1-9); 42 (1-9); 43 (1-9); 44 (1-9); 45 (1-9); 46 (1-9); 47 (1-9); 48 (1-9); 49 (1-7)
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