Scholars Portal
1949-2025
Preserved
2026-03-19
Preserved : 1 (1 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1, 2, 3/4); 5 (1 to 4); 6 (1, 2/3, 4); 7 (1/2, 3, 4); 8 (1 to 4); 9 (1/2, 3, 4); 10 (1 to 4); 11 (1/2, 3/4); 12 (1 to 4); 13 (1 to 4); 14 (1/2, 3, 4); 15 (1, 2/3, 4); 16 (1 to 4); 17 (1, 2, 3/4); 18 (1 to 4); 19 (1 to 4); 20 (1, 2, 3/4); 21 (1/2, 3, 4); 22 (1, 2/3, 4); 23 (1, 2/3, 4); 24 (1/2, 3/4); 25 (1/2, 3, 4); 26 (1/2, 3, 4); 27 (1, 2/3, 4); 28 (1/2, 3, 4); 29 (1, 2, 3/4); 30 (1, 2, 3/4); 31 (1, 2, 3/4); 32 (1/2, 3/4); 33 (1/2, 3/4); 34 (1/2, 3/4); 35 (1/2, 3, 4); 36 (1/2, 3/4); 37 (1, 2/3, 4); 38 (1, 2/3, 4); 39 (1, 2, 3/4); 40 (1, 2, 3/4); 41 (1, 2, 3/4); 42 (1, 2/3, 4); 43 (1/2, 3, 4); 44 (1/2, 3/4); 45 (1, 2/3, 4); 46 (1, 2, 3/4); 47 (1, 2/3, 4); 48 (1, 2/3, 4); 49 (1/2, 3, 4); 50 (1 to 4); 51 (1, 2, 3/4); 52 (1, 2/3, 4); 53 (1/2, 3, 4); 54 (1/2, 3, 4); 55 (1 to 4); 56 (1/2, 3, 4); 57 (1, 2, 3/4); 58 (1, 2/3, 4); 59 (1, 2, 3-4); 60 (1 to 4); 61 (1, 2-3, 4); 62 (1, 2, 3-4); 63 (1, 2-3, 4); 64 (1, 2, 3-4); 65 (1 to 4); 66 (1 to 4); 67 (1-2, 3, 4); 68 (1 to 4); 69 (1, 2, 3-4); 70 (1, 2, 3-4); 71 (1, 2)
Internet Archive
1949-2015
Preserved
2025-08-08
1 to 61
LOCKSS Archive
1949-2024
Preserved
2026-04-06
1 to 70
CLOCKSS Archive
2008-2017
Preserved
2026-04-06
54 to 63
LOCKSS Archive
2025-2025
In Progress
2026-04-06
71
Portico
1949-2025
Preserved
2026-04-02
Preserved : 1949/1950: 1(1-4), 1951/1952: 2(1-4), 1953/1954: 3(1-4), 1955/1956: 4(1-4), 1957/1958/1959: 5(1-4), 1960: 6(1-4), 1961/1962: 7(1-4), 1962: 8(1-4), 1963: 9(1-4), 1964: 10(1-4), 1965: 11(1-4), 1966: 12(1-4), 1967: 13(1-4), 1968: 14(1-4), 1969: 15(1-4), 1970: 16(1-4), 1971: 17(1-4), 1972: 18(1-4), 1973: 19(1-4), 1974: 20(1-4), 1975: 21(1-4), 1976: 22(1-4), 1977: 23(1-4), 1978: 24(1-4), 1979: 25(1-4), 1980: 26(1-4), 1981: 27(1-4), 1982: 28(1-4), 1983: 29(1-4), 1984: 30(1-4), 1985: 31(1-4), 1986: 32(1-4), 1987: 33(1-4), 1988: 34(1-4), 1989: 35(1-4), 1990: 36(1-4), 1991: 37(1-4), 1992: 38(1-4), 1993: 39(1-4), 1994: 40(1-4), 1995: 41(1-4), 1996: 42(1-4), 1997: 43(1-4), 1998: 44(1-4), 1999: 45(1-4), 2000: 46(1-4), 2001: 47(1-4), 2002: 48(1-4), 2003: 49(1-4), 2004: 50(1-4), 2005: 51(1-4), 2006: 52(1-4), 2007: 53(1-4), 2008: 54(1-4), 2009: 55(1-4), 2010: 56(1-4), 2011: 57(1-4), 2012: 58(1-4), 2013: 59(1-4), 2014: 60(1-4), 2015: 61(1-4), 2016: 62(1-4), 2017: 63(1-4), 2018: 64(1-4), 2019: 65(1-4), 2020: 66(1-4), 2021: 67(1-4), 2022: 68(1-4), 2023: 69(1-4), 2024: 70(1-4), 2025: 71(1-2)
CLOCKSS Archive
1949-2025
Preserved
2026-04-06
1 to 71
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : 5 (2 to 4); 6 (1 to 4); 7 (1, 2, 3-4); 43 (1-2, 3, 4); 44 (1-2, 3-4); 45 (1, 2-3, 4); 46 (1, 2, 3-4); 47 (1, 2-3, 4); 48 (1, 2-3, 4); 49 (1-2, 3, 4); 51 (1, 2, 3-4); 52 (1, 2-3, 4); 53 (1-2, 3, 4); 54 (1-2, 3, 4); 55 (1 to 4); 56 (1-2, 3, 4); 57 (1, 2, 3-4); 58 (1, 2-3, 4); 59 (1, 2, 3-4); 61 (1, 2-3, 4); 62 (1, 2, 3-4); 63 (1, 2-3, 4); 64 (1, 2, 3-4); 65 (1 to 4); 66 (1 to 4); 67 (1-2, 3, 4); 68 (1 to 4); 69 (1, 2, 3-4)
Library of Congress
2010-2024
Preserved
2025-04-07
56 (1-2, 3, 4); 57 (1 to 3-4); 58 (1, 2-3, 4); 59 (1 to 3-4); 60 (1 to 4); 61 (1, 2-3, 4); 62 (1 to 3-4); 63 (1, 2-3, 4); 64 (1 to 3-4); 65 (1 to 4); 66 (1 to 4); 67 (1-2, 3, 4); 68 (1 to 4); 69 (1 to 3-4); 70 (1, 2)