Scholars Portal
1964-2026
Preserved
2026-03-19
Preserved : 3; 4 (4); 5 (1, 2); 6 (3); 9 (2); 10 (3, 4); 11 (2); 14 (4); 15; 17; 19 (1); 22 (3/4); 25 (2 to 4); 26 (3); 27 (2); 28 (4); 29; 30 (1, 2, 4); 31 (1, 3); 32 (5); 33 (1); 34 (3 to 6); 35 (1 to 3, 5); 36 (1, 3, 4, 6); 37 (1 to 3); 38 (1, 2, 6); 39 (1 to 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1, 3 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 6); 61 (1 to 6); 62 (1, 3 to 6); 63 (1 to 6); 64 (1, 2)
Internet Archive
1962-2001
Preserved
2025-08-08
1 to 39
Portico
2001-2014
Preserved
2026-04-09
Preserved : 2001: 39(1-6), 2002: 40(1-6), 2003: 41(1-6), 2004: 42(1-6), 2005: 43(1-6), 2006: 44(1-6), 2007: 45(1-6), 2008: 46(1-6), 2009: 47(1-6), 2010: 48(1-6), 2011: 49(1-6), 2012: 50(1-6), 2013: 51(1-6), 2014: 52(1-3)
LOCKSS Archive
1962-2024
Preserved
2026-04-06
1 to 62
CLOCKSS Archive
1963-2025
Preserved
2026-04-06
1 to 64
LOCKSS Archive
2025-2026
In Progress
2026-04-06
63, 64
Portico
1962-2026
Preserved
2026-04-09
Preserved : 1962/1963: 1(1-4), 1963/1964: 2(1-4), 1964/1965: 3(1-4), 1965/1966: 4(1-4), 1966/1967: 5(1-4), 1967/1968: 6(1-4), 1968/1969: 7(1-4), 1969/1970: 8(1-4), 1970/1971: 9(1-4), 1971/1972: 10(1-4), 1972/1973: 11(1-4), 1973/1974: 12(1-4), 1974/1975: 13(1-4), 1975/1976: 14(1-4), 1976/1977: 15(1-4), 1977/1978: 16(1-4), 1978/1979: 17(1-4), 1979/1980: 18(1-4), 1980/1981: 19(1-4), 1981/1982: 20(1-4), 1982/1983: 21(1-4), 1983/1984: 22(1-4), 1984/1985: 23(1-4), 1985/1986: 24(1-4), 1986/1987: 25(1-4), 1987/1988: 26(1-4), 1988/1989: 27(1-4), 1989/1990: 28(1-4), 1990/1991: 29(1-4), 1991/1992: 30(1-4), 1992/1993: 31(1-4), 1994: 32(1-6), 1995: 33(1-6), 1996: 34(1-6), 1997: 35(1-6), 1998: 36(1-6), 1999: 37(1-6), 2000: 38(1-6), 2001: 39(1-6), 2002: 40(1-6), 2003: 41(1-6), 2004: 42(1-6), 2005: 43(1-6), 2006: 44(1-6), 2007: 45(1-6), 2008: 46(1-6), 2009: 47(1-6), 2010: 48(1-6), 2011: 49(1-6), 2012: 50(1-6), 2013: 51(1-6), 2014: 52(1-6), 2015: 53(1-6), 2016: 54(1-6), 2017: 55(1-6), 2018: 56(1-6), 2019: 57(1-6), 2020: 58(1-6), 2021: 59(1-6), 2022: 60(1-6), 2023: 61(1-6), 2024: 62(1-6), 2025: 63(1-6), 2026: 64(1-2)
National Digital Preservation Program, China
1997-2025
Preserved
2025-12-04
Preserved : 4 (1 to 6); 5 (1 to 3, 5, 6); 6 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1, 2, 4 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1)
Library of Congress
2010-2024
Preserved
2025-04-07
48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (2 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 6); 61 (1 to 6); 62 (1 to 6)