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Portico
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Preserved
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2026-02-12
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Preserved : 1945: 1(1-9), 1946: 2(1-12), 1947: 3(1-12), 1948: 4(1-12), 1949: 5(1-12), 1950: 6(1-12), 1951: 7(1-12), 1952: 8(1-12), 1953: 9(1-12), 1954: 10(1-4, 7-10, 12), 1955: 11(1-12), 1956: 12(3-5, 7, 12), 1957: 13(1-6, 8-9, 12), 1958: 14(1-9, 11), 1959: 15(2-8, 10-12), 1960: 16(1-12), 1961: 17(1, 3-4, 9-10, 12), 1962: 18(1-12), 1963: 19(2, 4, 7, 9-12), 1964: 20(1-12), 1965: 21(1, 3-8, 11), 1966: 22(1, 3, 5-6, 8, 11-12), 1967: 23(1-2, 6, 8, 10-11), 1968: 24(1-2, 4-5, 7, 9, 12), 1969: 25(2-4, 6-12), 1970: 26(1-12), 1971: 27(1-12), 1972: 28(1-12), 1973: 29(1-12), 1974: 30(1, 3-12), 1975: 31(1-12), 1976: 32(1-12), 1977: 33(1-12), 1978: 34(1-12), 1979: 35(1-12), 1980: 36(1-12), 1981: 37(1-12), 1982: 38(1-12), 1983: 39(1-12), 1984: 40(1-12), 1985: 41(1-12), 1986: 42(1-9, 11-12), 1987: 43(1-12), 1988: 44(1, S 1, 2-12), 1989: 45(1, S 1, 2-12), 1990: 46(1, S 1, 2-12), 1991: 47(1-12), 1992: 48(1, S 1, 2-12), 1993: 49(1-3, 5-11), 1994: 50(1, S 1, 2-12), 1995: 51(1, S 1, 2-12), 1996: 52(1, S 1, 2, 4, 10-11)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 53 (1 to 10, 11/12); 54 (, 1 to 12); 55 (, 1 to 5, 6/7, 8, 10 to 12); 56 (, 1, 3, 5-6, 7, 9-10, 11-12); 57 (, 1 to 7, 8-9, 10 to 12, 13-14); 58 (, 1 to 4, 5-6, 7 to 12, 14); 59 (, 1 to 12); 60 (, 1 to 12); 61 (, 1 to 6, 7-8, 9 to 19, 21 to 24); 62 (, 1 to 6, 7-8, 9 to 18, 19-20, 21 to 24); 63 (, 1 to 7, 9 to 19, 21 to 24); 64 (, 1, 2, 4 to 7, 9 to 18, 19-20, 21 to 24); 65 (, 1 to 6, 7-8, 9 to 24); 66 (, 1 to 10, 11-12, 13 to 24); 67 (, 1 to 24); 68 (, 1 to 24); 69 (, 1 to 24); 70 (, 1 to 24); 71 (, 1 to 24); 72 (, 1 to 24); 73 (, 1 to 10, 11-12, 13 to 24); 74 (, 1 to 24); 75 (, 1 to 24); 76 (, 3, 6, 12, 13, 15 to 24); 77 (, 1 to 24); 78 (, 1 to 16, 17-18, 19-20, 21-22, 23, 24); 79 (, 1 to 12); 80 (, 1 to 12); 81 (, 1); 156 (, 5-6); 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; 2024
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Internet Archive
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Preserved
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2025-08-08
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1 to 65
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 83
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 52(4), 1997: 53(1-12), 1998: 54(1-12), 1999: 55(1-12), 1999: 56(1-12), 2000: 57(1-14), 2001: 58(1-14), 2002: 59(1-12), 2003: 60(1-12), 2004: 61(1-24), 2005: 62(1-24), 2006: 63(1-24), 2007: 64(1-24), 2008: 65(1-24), 2009: 66(1-24), 2010: 67(1-24), 2011: 68(1-24), 2012: 69(1-17, 21, 23-24), 2013: 70(1-21, 23), 2014: 71(1-24), 2015: 72(3, 6-24), 2016: 73(1-24), 2017: 74(1-24), 2018: 75(1-24), 2019: 76(1-24), 2019/2020: 77(1-24), 2021: 78(1-24), 2022: 79(1-12), 2023: 80(1, S 1, 2-12), 2023: 81(1)
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LOCKSS Archive
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Preserved
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2026-02-09
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62 to 75
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LOCKSS Archive
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In Progress
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2026-02-09
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76
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 82 (1); 2024; 2025
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Library of Congress
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Preserved
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2025-04-07
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74 (21); 75 (4 to 24); 76 (1 to 24); 77 (1 to 24); 78 (1 to 17-18, 19-20, 21-22, 23, 24); 79 (1 to 12); 80 (1, S1, 2 to 12); 81 (1)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 6 (1 to 9, 11, 12); 7 (1 to 9, 11 to 19, 21 to 24); 8 (Suppl 1, 1 to 9, 11, 12); 53 (1 to 9, 11); 54 (1 to 9, 11, 12); 55 (1 to 6, 8, 11, 12); 56 (1, 3, 5, 7, 9, 11); 57 (1 to 8, 11 to 13); 58 (1 to 5, 7 to 9, 11, 12, 14); 59 (1 to 9, 11, 12); 61 (1 to 7, 9, 11 to 19, 21 to 24); 62 (1 to 7, 9, 11 to 19, 21 to 24); 63 (1 to 7, 9, 11 to 19, 21 to 24); 64 (1 to 7, 9, 11 to 19, 21 to 24); 65 (1 to 7, 9, 11 to 19, 21 to 24); 66 (1 to 9, 11, 13 to 19, 21 to 24); 67 (1 to 9, 11 to 19, 21 to 24); 68 (1 to 9, 11 to 19, 21 to 24); 69 (1 to 9, 11 to 19, 21 to 24); 71 (1 to 9, 11 to 19, 21 to 24); 72 (1 to 9, 11 to 19, 21 to 24); 73 (1 to 9, 11, 13 to 19, 21 to 24); 74 (1 to 9, 11 to 19, 21 to 24); 75 (1 to 9, 11 to 19, 21 to 24); 76 (1 to 9, 11 to 19, 21 to 24); 77 (1 to 9, 11 to 19, 21 to 24); 78 (1 to 9, 11 to 16, 17-18, 19-2, 21-22, 23, 24); 79 (1 to 9, 11, 12)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 6 (1 to 9, 11, 12); 7 (1 to 9, 11 to 19, 21 to 24); 8 (Suppl 1, 1 to 9, 11, 12); 53 (1 to 9, 11); 54 (1 to 9, 11, 12); 55 (1 to 6, 8, 11, 12); 56 (1, 3, 5, 7, 9, 11); 57 (1 to 8, 11 to 13); 58 (1 to 5, 7 to 9, 11, 12, 14); 59 (1 to 9, 11, 12); 61 (1 to 7, 9, 11 to 19, 21 to 24); 62 (1 to 7, 9, 11 to 19, 21 to 24); 63 (1 to 7, 9, 11 to 19, 21 to 24); 64 (1 to 7, 9, 11 to 19, 21 to 24); 65 (1 to 7, 9, 11 to 19, 21 to 24); 66 (1 to 9, 11, 13 to 19, 21 to 24); 67 (1 to 9, 11 to 19, 21 to 24); 68 (1 to 9, 11 to 19, 21 to 24); 69 (1 to 9, 11 to 19, 21 to 24); 71 (1 to 9, 11 to 19, 21 to 24); 72 (1 to 9, 11 to 19, 21 to 24); 73 (1 to 9, 11, 13 to 19, 21 to 24); 74 (1 to 9, 11 to 19, 21 to 24); 75 (1 to 9, 11 to 19, 21 to 24); 76 (1 to 9, 11 to 19, 21 to 24); 77 (1 to 9, 11 to 19, 21 to 24); 78 (1 to 9, 11 to 16, 17-18, 19-2, 21-22, 23, 24); 79 (1 to 9, 11, 12)
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 53 (1-10, 11-12); 54 (1-12); 55 (1-5, 6-7, 8-9, 10-12); 56 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 57 (1-7, 8-9, 10-12, 13-14); 58 (1, 2, 4, 7); 59 (2, 9-12); 60 (1-12); 61 (1-6, 7-8, 9-18, 19-20, 21-24); 62 (1-6, 7-8, 9-18, 19-20, 21-24); 63 (1-6, 7-8, 9-12, 14-18, 19-20, 21-24); 64 (1, 2, 4-6, 7-8, 9-18, 19-20, 21-24); 65 (1-6, 7-8, 9-24); 66 (1-10, 11-12, 13-24); 67 (1-24); 68 (1-24); 69 (1-24); 70 (1-19, 21-24); 71 (1-24); 72 (1-24); 73 (1-10, 11-12, 13-24); 74 (1-24); 75 (1-24); 76 (1-22); 312 (8079)
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