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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 22 (1 to 52); 23 (, 1 to 52); 24 (, 1 to 52); 25 (, 1 to 52); 26 (, 1 to 52); 27 (, 1 to 52); 28 (, 1 to 52); 29 (, 1 to 52); 30 (, 1 to 52); 31 (, 1 to 52); 32 (, 1 to 52); 33 (, 1 to 52); 34 (, 1 to 52); 35 (, 1 to 30, 32 to 52); 36 (, 1 to 52); 37 (, 1 to 52); 38 (, 1 to 52); 39 (, 1 to 52); 40 (, 1 to 22, 24 to 52); 41 (, 1 to 42, 44 to 52); 42 (, 1 to 52); 43 (, 2 to 6); 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012
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CLOCKSS Archive
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Preserved
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2026-02-09
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18 to 47
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Portico
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Preserved
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2026-02-12
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Preserved : 1987: 18(1-52), 1988: 19(1-52), 1989: 20(1-52), 1990: 21(1-52), 1991: 22(1-52), 1992: 23(1-52), 1993: 24(1-52), 1994: 25(1-52), 1995: 26(1-52), 1996: 27(1-52), 1997: 28(1-52), 1998: 29(1-52), 1999: 30(1-52), 2000: 31(1-52), 2001: 32(1-52), 2002: 33(1-52), 2003: 34(1-52), 2004: 35(1-52), 2005: 36(1-52), 2006: 37(1-52), 2007: 38(1-52), 2008: 39(1-52), 2009: 40(1-52), 2010: 41(1-52), 2011: 42(1-52), 2012: 43(1-52), 2013: 44(1-52), 2014: 45(1-52), 2015: 46(1-52), 2015/2016: 47(1-52)
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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 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 4 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 28 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 29 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 31 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 32 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 33 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 34 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 35 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 36 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 37 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 38 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 39 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 41 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 42 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 43 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 44 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 45 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 46 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 47 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52)
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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 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 4 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 28 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 29 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 31 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 32 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 33 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 34 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 35 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 36 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 37 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 38 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 39 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 41 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 42 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 43 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 44 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 45 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 46 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52); 47 (1 to 9, 11 to 19, 21 to 29, 31 to 39, 41 to 49, 51, 52)
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Library of Congress
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Preserved
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2025-04-07
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18 (1 to 52); 19 (1 to 52); 20 (1 to 52); 21 (1 to 52); 34 (5); 46 (1 to 52); 47 (1 to 42, 44 to 46, 48, 50 to 52)
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