Internet Archive
1948-1960
Preserved
2025-08-08
1 to 12
Scholars Portal
1948-2025
Preserved
2026-03-19
Preserved : 1 (2, 3); 3 (1, 2); 4 (1, 2); 5 (1, 2); 6 (1, 2); 7 (1, 2); 8 (1, 2); 9 (1, 2); 10 (1, 2); 11 (1, 2); 12 (1, 2); 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); 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, 2); 55 (1, 2); 56 (1, 2); 57 (1, 2); 58 (1, 2); 59 (1, 2); 60 (1, 2); 61 (1, 2); 62 (1, 2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1 to 3); 70 (1 to 3); 71 (1 to 3); 72 (1 to 3); 73 (1 to 3); 74 (1, 2-3); 75 (1 to 3); 76 (1, 2-3); 77 (1, 2-3)
HathiTrust
1951-2014
Preserved
2025-11-01
v.8 no.1 1956; v.7 no.1 1955; v.6 no.2 1954; v.6 no.1 1954; v.6 1954; v.58-59 2006-07; v.56-57 2004-05; v.54-55 2002-03; v.3 no.2 1951; v.17 1965 +index v.13-17 1961-65; v.11 1959; V3-6; V7; V8; V15-16; V17-18; V21-22; V27-28; V29-30; V31-32; V36; V37-38; V39-40; V41-42; V43-44; V45 1993; V46 1994; v.47 1995; v.48 1996-1997; v.49 1997-1998; v.50 1998; v.51-52 1999-2000; v.53 2001; v.54 2002; v.55 2003; v.56 2004; v.57 2005; v.58 2006; v.59 2007; v.60 2008; v.61 2009; v.62 2010; v.63 2011; v.65 2013; v.66 2014; v.44(1992); v.10-11(1958-1959); v.13(1961); v.14-15(1962-1963); v.16-17(1964-1965); v.18(1966); v.20-22(1968-1970); v.27-30(1975-1978); v.19(1967); v.47-48 (W/O v.47:2)(1996-1997); v.40-41 (W/O v.41:1)(1988-1989); v.38-39(1986-1987); v.9:2(1957); v.12(1960); v.36-37(1984-1985); v.42-43(1990-1991); v.45-46(1993-1994); v.49 (July 1997-Jan 1998); v.53-54 (2001-02); v.55-56 (2003-04); v.57-58 (2005-06); v.59-60 (2007-08); v.61-62 (2009-10); v.45-46 (1993-94); v.63-64 (2011-12); v.33-35 (1981-82); v.47 no.2 (1995); v.60-61(2008-2009); v.48 no.1 (1996); v.52-53(2000-01) v.28-30; v.31-34(1979-82); v.35
Portico
1948-1949
Preserved
2026-05-07
Preserved : 1948/1949: 1(1-3)
CLOCKSS Archive
1951-2016
In Progress
2026-05-04
3 to 59, 68
Portico
1951-2016
Preserved
2026-05-07
Preserved : 1951: 3(1-2), 1952: 4(1-2), 1953: 5(1-2), 1954: 6(1-2), 1955: 7(1-2), 1956: 8(1-2), 1957: 9(1-2), 1958: 10(1-2), 1959: 11(1-2), 1960: 12(1-2), 1961: 13(1-2), 1962: 14(1-2), 1963: 15(1-2), 1964: 16(1-2), 1965: 17(1-2), 1966: 18(1-2), 1967: 19(1-2), 1968: 20(1-2), 1969: 21(1-2), 1970: 22(1-2), 1971: 23(1-2), 1972: 24(1-2), 1973: 25(1-2), 1974: 26(1-2), 1975: 27(1-2), 1976: 28(1-2), 1977: 29(1-2), 1978: 30(1-2), 1979: 31(1-2), 1980: 32(1-2), 1981: 33(1-2), 1982: 34(1-2), 1983: 35(1-2), 1984: 36(1-2), 1985: 37(1-2), 1986: 38(1-2), 1987: 39(1-2), 1988: 40(1-2), 1989: 41(1-2), 1990: 42(1-2), 1991: 43(1-2), 1992: 44(1-2), 1993: 45(1-2), 1994: 46(1-2), 1995: 47(1-2), 1996/1997: 48(1-2), 1997/1998: 49(1-2), 1998/1999: 50(1-2), 1999: 51(1-2), 2000: 52(1-2), 2001: 53(1-2), 2002: 54(1-2), 2003: 55(1-2), 2004: 56(1-2), 2005: 57(1-2), 2006: 58(1-2), 2007: 59(1-2), 2008: 60(1-2), 2009: 61(1-2), 2010: 62(1-2), 2011: 63(1-2), 2012: 64(1-2), 2013: 65(1-2), 2014: 66(1-2), 2015: 67(1-2), 2016: 68(1-2)
CLOCKSS Archive
2008-2015
Preserved
2026-05-04
60 to 67
LOCKSS Archive
2008-2016
Preserved
2026-05-04
60, 61, 68
LOCKSS Archive
1948-2024
Preserved
2026-05-04
1, 3 to 26, 28 to 76
CLOCKSS Archive
1948-2025
Preserved
2026-05-04
ahead-of-print, 1, 3 to 26, 28 to 77
LOCKSS Archive
2025-2025
In Progress
2026-05-04
77
Portico
1948-1949
Preserved
2026-05-07
Preserved : 1948/1949: 1(1-3)
Portico
1951-1974
Preserved
2026-05-07
Preserved : 1951: 3(1-2), 1952: 4(1-2), 1953: 5(1-2), 1954: 6(1-2), 1955: 7(1-2), 1956: 8(1-2), 1957: 9(1-2), 1958: 10(1-2), 1959: 11(1-2), 1960: 12(1-2), 1961: 13(1-2), 1962: 14(1-2), 1963: 15(1-2), 1964: 16(1-2), 1965: 17(1-2), 1966: 18(1-2), 1967: 19(1-2), 1968: 20(1-2), 1969: 21(1-2), 1970: 22(1-2), 1971: 23(1-2), 1972: 24(1-2), 1973: 25(1-2), 1974: 26(1-2)
Portico
1976-2025
Preserved
2026-05-07
Preserved : 1976: 28(1-2), 1977: 29(1-2), 1978: 30(1-2), 1979: 31(1-2), 1980: 32(1-2), 1981: 33(1-2), 1982: 34(1-2), 1983: 35(1-2), 1984: 36(1-2), 1985: 37(1-2), 1986: 38(1-2), 1987: 39(1-2), 1988: 40(1-2), 1989: 41(1-2), 1990: 42(1-2), 1991: 43(1-2), 1992: 44(1-2), 1993: 45(1-2), 1994: 46(1-2), 1995: 47(1-2), 1996/1997: 48(1-2), 1997/1998: 49(1-2), 1998/1999: 50(1-2), 1999: 51(1-2), 2000: 52(1-2), 2001: 53(1-2), 2002: 54(1-2), 2003: 55(1-2), 2004: 56(1-2), 2005: 57(1-2), 2006: 58(1-2), 2007: 59(1-2), 2008: 60(1-2), 2009: 61(1-2), 2010: 62(1-2), 2011: 63(1-2), 2012: 64(1-2), 2013: 65(1-2), 2014: 66(1-2), 2015: 67(1-2), 2016: 68(1-2), 2017: 69(1-3), 2018: 70(1-3), 2019: 71(1-3), 2020: 72(1-3), 2021: 73(1-3), 2022: 74(1-3), 2023: 75(1-3), 2024: 76(1-3), 2025: 77(1-3)
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : 5 (2); 6 (1, 2); 7 (1 to 3); 48 (2); 49 (1, 2); 51 (1, 2); 52 (1, 2); 53 (1, 2); 54 (1, 2); 55 (1, 2); 56 (1, 2); 57 (1, 2); 58 (1, 2); 59 (1, 2); 61 (1, 2); 62 (1, 2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1 to 3); 71 (1 to 3); 72 (1 to 3); 73 (1 to 3); 74 (1, 2-3); 75 (1 to 3); 76 (1, 2-3)
Library of Congress
2010-2024
Preserved
2025-04-07
62 (1, 2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2); 69 (1 to 3); 70 (1 to 3); 71 (1 to 3); 72 (1 to 3); 73 (1 to 3); 74 (1, 2-3); 75 (1 to 3); 76 (1)
National Library of the Netherlands
2009-2016
Preserved
2024-12-15
Preserved : 29 (6); 30 (1-6); 61 (2); 62 (1, 2); 63 (1, 2); 64 (1, 2); 65 (1, 2); 66 (1, 2); 67 (1, 2); 68 (1, 2)
British Library
-
Preserved
2019-09-18
Preserved : 66 (1 to 2), 67 (1 to 2), 68 (1 to 2)