Scholars Portal
1968-2023
Preserved
2025-09-02
Preserved : 1 (1 to 3); 2 (, 1); 3 (, 1); 4 (, 1); 5 (, 1); 6 (, 1); 7 (, 1); 8 (, 1); 9 (, 1); 10 (, 1); 11 (, 1); 12 (, 1); 13 (, 1, 2); 14 (, 1, 2); 15 (, 1, 2); 16 (, 1, 2); 17 (, 1, 2); 18 (, 1, 2); 19 (, 1, 2); 20 (, 1, 2); 21 (, 1, 2); 22 (, 1, 2); 23 (, 1, 2); 24 (, 1, 2); 25 (, 1, 2); 26 (, 1, 2); 27 (, 1, 2); 28 (, 1, 2); 29 (, 1, 2); 30 (, 1, 2); 31 (, 1, 2); 32 (, 1, 2); 33 (, 1, 2); 34 (, 1, 2); 35 (, 1, 2); 36 (, 1, 2); 37 (, 1, 2); 38 (, 1, 2); 39 (, 1, 2); 40 (, 1, 2); 41 (, 1, 2); 42 (, 1, 2); 43 (, 1, 2); 44 (, 1, 2); 45 (, 1, 2); 46 (, 1, 2); 47 (, 1, 2); 48 (, 1, 2); 49 (, 1, 2); 50 (, 1, 2); 51 (, 1, 2); 52 (, 1-2); 53 (, 1, 2); 54 (, 1); 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023
Internet Archive
1968-2006
Preserved
2025-08-08
1-25 to 37
LOCKSS Archive
2010-2012
Preserved
2026-02-09
41 to 43
CLOCKSS Archive
2010-2015
Preserved
2026-02-09
41 to 46
Portico
1968-2015
Preserved
2026-02-12
Preserved : 1968/1969/1970: 1(1-3), 1971: 2(1), 1972: 3(1), 1973: 4(1), 1974: 5(1), 1975: 6(1), 1976: 7(1), 1977: 8(1), 1978: 9(1), 1979: 10(1), 1980: 11(1), 1981: 12(1), 1982: 13(1-2), 1983: 14(1-2), 1984: 15(1-2), 1985: 16(1-2), 1986: 17(1-2), 1987: 18(1-2), 1988: 19(1-2), 1989: 20(1-2), 1990: 21(1-2), 1991: 22(1-2), 1992: 23(1-2), 1993: 24(1-2), 1994: 25(1-2), 1995: 26(1-2), 1996: 27(1-2), 1997: 28(1-2), 1998: 29(1-2), 1999: 30(1-2), 2000: 31(1-2), 2001: 32(1-2), 2002: 33(1-2), 2003: 34(1-2), 2004: 35(1-2), 2005: 36(1-2), 2006: 37(1-2), 2007: 38(1-2), 2008: 39(1-2), 2009: 40(1-2), 2010: 41(1-2), 2011: 42(1-2), 2012: 43(1-2), 2013: 44(1-2), 2014: 45(1-2), 2015: 46(1)
LOCKSS Archive
1968-2024
Preserved
2026-02-09
1 to 54
CLOCKSS Archive
1968-2025
Preserved
2026-02-09
1 to 54
Portico
2001-2023
Preserved
2026-02-12
Preserved : 2001: 32(1-2), 2002: 33(1-2), 2003: 34(1-2), 2004: 35(1-2), 2005: 36(1-2), 2006: 37(1-2), 2007: 38(1-2), 2008: 39(1-2), 2009: 40(1-2), 2010: 41(1-2), 2011: 42(1-2), 2012: 43(1-2), 2013: 44(1-2), 2014: 45(1-2), 2015: 46(1-2), 2016: 47(1-2), 2017: 48(1-2), 2018: 49(1-2), 2019: 50(1-2), 2020: 51(1-2), 2021: 52(1-2), 2022: 53(1-2), 2023: 54(1-2)
National Digital Preservation Program, China
2017-2018
Preserved
2025-12-04
Preserved : 48 (1, 2); 49 (1)
National Digital Preservation Program, China
2017-2020
Preserved
2025-12-04
Preserved : 48 (1, 2); 49 (1); 51
National Digital Preservation Program, China
1997-2023
Preserved
2025-12-04
Preserved : 3 (2); 4 (1, 2); 5 (1, 2); 28 (1, 2); 29 (1, 2); 31 (1, 2); 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 41 (sup1, 1, 2); 42 (1, 2); 43 (1, 2); 44 (1, 2); 45 (1, 2); 46 (1, 2); 47 (1, 2); 48 (1, 2); 49 (1, 2); 51 (1, 2); 52 (1-2); 53 (2); 54 (1)
Library of Congress
2017-2022
Preserved
2025-04-07
47 (2); 48 (1, 2); 49 (1, 2); 50 (1, 2); 51 (1, 2); 52 (1-2); 53 (1, 2)