Internet Archive
1952-2014
Preserved
2025-08-08
1 to 55
Scholars Portal
1956-2026
Preserved
2026-03-19
Preserved : 1 (2, 3); 2 (1 to 3); 3 (1 to 3); 4 (1 to 3); 5 (1 to 3); 6 (1 to 3); 7 (1 to 3); 8 (1 to 3); 9 (1 to 3); 10 (1 to 3); 11 (1 to 3); 12 (1 to 3); 13 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1 to 3); 20 (1 to 3); 21 (1 to 3); 22 (1, 3); 26 (2 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 30 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1, 2); 54 (1 to 4); 55 (1 to 5); 56 (1 to 3, 5); 57 (1 to 5); 58 (1 to 5); 59 (1 to 5); 60 (1 to 5); 61 (1 to 5); 62 (1 to 5); 63 (1 to 5); 64 (1 to 5); 65 (1 to 5); 66 (1 to 5); 67 (1)
LOCKSS Archive
1956-2024
Preserved
2026-05-04
1 to 65
CLOCKSS Archive
1956-2025
Preserved
2026-05-04
ahead-of-print to 67
LOCKSS Archive
2025-2026
In Progress
2026-05-04
66, 67
Portico
1956-2026
Preserved
2026-04-30
Preserved : 1956/1957/1958: 1(1-3), 1958/1959: 2(1-3), 1959/1960: 3(1-3), 1961/1962: 4(1-3), 1962: 5(1-3), 1963: 6(1-3), 1964/1965: 7(1-3), 1965/1966: 8(1-3), 1966/1967: 9(1-3), 1967/1968: 10(1-3), 1968/1969: 11(1-3), 1970: 12(1-3), 1971/1972: 13(1-3), 1972/1973: 14(1-3), 1973/1974: 15(1-3), 1974/1975: 16(1-3), 1975/1976: 17(1-3), 1976/1977: 18(1-3), 1977/1978: 19(1-3), 1978/1979: 20(1-3), 1979/1980: 21(1-3), 1980/1981: 22(1-3), 1981/1982: 23(1-3), 1982/1983: 24(1-4), 1983/1984: 25(1-4), 1984/1985: 26(1-4), 1985/1986: 27(1-4), 1986/1987: 28(1-4), 1987/1988: 29(1-4), 1988/1989: 30(1-4), 1989/1990: 31(1-4), 1990/1991: 32(1-4), 1991/1992: 33(1-4), 1992/1993: 34(1-4), 1993/1994: 35(1-4), 1994/1995: 36(1-4), 1995/1996: 37(1-4), 1996/1997: 38(1-4), 1997: 39(1), 1998: 40(1), 1999/2000: 41(1-4), 2000/2001: 42(1-4), 2001/2002: 43(1-4), 2002/2003: 44(1-4), 2003/2004: 45(1-4), 2004/2005: 46(1-4), 2005/2006: 47(1-4), 2006/2007: 48(1-4), 2007/2008: 49(1-4), 2008/2009: 50(1-4), 2010: 51(1-4), 2011: 52(1-4), 2012: 53(1-4), 2013: 54(1-4), 2014: 55(1-5), 2015: 56(1-5), 2016: 57(1-5), 2017: 58(1-5), 2018: 59(1-5), 2019: 60(1-5), 2020: 61(1-5), 2021: 62(1-5), 2022: 63(1-5), 2023: 64(1-5), 2024: 65(1-5), 2025: 66(1-5), 2026: 67(1-2)
Library of Congress
2017-2024
Preserved
2025-04-07
58 (3 to 5); 59 (1 to 5); 60 (1 to 5); 61 (1 to 5); 62 (1 to 5); 63 (1 to 5); 64 (1 to 5); 65 (1 to 5)
National Digital Preservation Program, China
1997-2025
Preserved
2025-12-04
Preserved : 4 (1 to 4); 5 (1 to 4); 6 (1 to 5); 38 (2 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 5); 56 (1 to 5); 57 (1 to 5); 58 (1 to 5); 59 (1 to 5); 61 (1 to 5); 62 (1, 3 to 5); 63 (1 to 5); 64 (1 to 5); 65 (1 to 5); 66 (1)