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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 1(1-4), 1972: 2(1-4), 1973: 3(1-6), 1974: 4(1-6), 1975: 5(1-6), 1976: 6(1, S1, 2-3, S3, 4-6), 1977: 7(1-6), 1978: 8(1-6), 1979: 9(1-6), 1980: 10(1-6), 1981: 11(1-6), 1982: 12(1-6), 1983: 13(1-6), 1984: 14(1-6, S 6), 1985: 15(1-6), 1986: 16(1-2, S 2, 3, S 3, 4-6), 1987: 17(1, S 1, 2-6), 1988: 18(1-7), 1989: 19(1, S 1, 2-6), 1990: 20(1-6), 1991: 21(1, S1, 2-6), 1992: 22(1-6), 1993: 23(1-6), 1994: 24(1-6), 1995: 25(1-6), 1996: 26(1-6), 1997: 27(1-6), 1998: 28(1-6), 1999: 29(1-6), 2000: 30(1-6)
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Portico
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Preserved
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2026-02-12
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Preserved : 1952: 1(1-2), 1953: 2(1-2), 1954: 3(1-4), 1955: 4(1-4), 1956: 5(1-4), 1957: 6(1-4), 1958: 7(1-4), 1959: 8(1-4), 1960: 9(1-4), 1961: 10(1-4), 1962: 11(1-4), 1963: 12(1-4), 1964: 13(1-4), 1965: 14(1-4), 1966: 15(1-4), 1967: 16(1-4), 1968: 17(1-4), 1969: 18(1-4), 1970: 19(1, S 1, 2-4)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 8; 31 (1, 3 to 9); 32 (, 1-2, 3, 4, 5-6, 7, 8, 9-10, 11, 12); 33 (, 1-2, 3, 4, 5-6, 7, 8, 9-10, 11, 12); 34 (, 1-2, 3 to 8, 9-10, 11, 12); 35 (, 1 to 12); 36 (, 1 to 12); 37 (, 1 to 12); 38 (, 1 to 5 to 7 to 12); 39 (, 1 to 11); 40 (, 1 to 12); 41 (, 1b, 2 to 12); 42 (, 1 to 12); 43 (, 1 to 12); 44 (, 1 to 11, 12a); 45 (, 1 to 12); 46 (, 1 to 12); 47 (, 1 to 12); 48 (, 1 to 12); 49 (, 1 to 12); 50 (, 1 to 12); 51 (, 1 to 12); 52 (, 1 to 12); 53 (, 1 to 12); 54 (, 1 to 12); 55 (, 1 to 7); 1978; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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1 to 39
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 19, 21 to 56
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Portico
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Preserved
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2026-02-12
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Preserved : 2001: 31(1-9), 2002: 32(3-4, 7-12), 2003: 33(1-2, 1-6, 5-8, 11-12), 2004: 34(1-2, 1-10, 9-11), 2005: 35(1-12), 2006: 36(1-12), 2007: 37(1-12), 2008: 38(1-5, 6, a, 6, b, 7-12), 2009: 39(1-12), 2010: 40(1-12), 2011: 41(1, a, 1, b, 2-12), 2012: 42(1-4, S4, 5, S5, 6-12), 2013: 43(1, S1, 2, S2, 3, S3, 4, S4, 5-12), 2014: 44(1, S1, 2, S2, 3, S3, 4, S4, 5-12a), 2015: 45(1, S1, 2, S2, 3, S3, 4, S4, 5-12), 2016: 46(1, S1, 2, S2, 3, S3, 4, S4, 5-12), 2017: 47(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6, S6, 7-12), 2018: 48(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6, S6, 7-12), 2019: 49(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6-12), 2020: 50(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6-12), 2021: 51(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6, S6, 7, S7, 8-12), 2022: 52(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6-12), 2023: 53(1, S1, 2, S2, 3, S3, 4, S4, 5-12), 2024: 54(1, S1, 2, S2, 3, S3, 4, S4, 5-12), 2025: 55(1, S1, 2, S2, 3, S3, 4, S4, 5, S5, 6, S6, 7, S7, 8-12), 2026: 56(1-2)
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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 : 3 (1 to 6); 4 (, 1 to 9, 11, 12); 5 (S1, 1 to 9, 11, 12); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 9); 32 (1?2, 3, 4, 5?6, 7, 8, 9?1, 11, 12); 33 (1?2, 3, 4, 5?6, 7, 8, 9?1, 11, 12); 34 (1?2, 3 to 8, 9?1, 11, 12); 35 (, 1 to 9, 11, 12); 36 (, 1 to 9, 11, 12); 37 (, 1 to 9, 11, 12); 38 (, 1 to 5 to 7 to 9, 11, 12); 39 (, 1 to 9, 11, 12); 41 (, 1b, 2 to 9, 11, 12); 42 (, 1 to 9, 11, 12); 43 (, 1 to 9, 11, 12); 44 (, 1 to 9, 11, 12a); 45 (, 1 to 9, 11, 12); 46 (, 1 to 9, 11, 12); 47 (, 1 to 9, 11, 12); 48 (, 1 to 9, 11, 12); 49 (S1, 1, 2, 4 to 9, 11, 12); 51 (S1, 1 to 9, 11, 12); 52 (S1, 1 to 9, 11, 12); 53 (S1, 1 to 9, 11, 12); 54 (S1, 1, 2, 4, 6 to 9, 11, 12); 55 (S2, 1 to 4, 6 to 9)
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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 : 3 (1 to 6); 4 (, 1 to 9, 11, 12); 5 (S1, 1 to 9, 11, 12); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 9); 32 (1?2, 3, 4, 5?6, 7, 8, 9?1, 11, 12); 33 (1?2, 3, 4, 5?6, 7, 8, 9?1, 11, 12); 34 (1?2, 3 to 8, 9?1, 11, 12); 35 (, 1 to 9, 11, 12); 36 (, 1 to 9, 11, 12); 37 (, 1 to 9, 11, 12); 38 (, 1 to 5 to 7 to 9, 11, 12); 39 (, 1 to 9, 11, 12); 41 (, 1b, 2 to 9, 11, 12); 42 (, 1 to 9, 11, 12); 43 (, 1 to 9, 11, 12); 44 (, 1 to 9, 11, 12a); 45 (, 1 to 9, 11, 12); 46 (, 1 to 9, 11, 12); 47 (, 1 to 9, 11, 12); 48 (, 1 to 9, 11, 12); 49 (S1, 1, 2, 4 to 9, 11, 12); 51 (S1, 1 to 9, 11, 12); 52 (S1, 1 to 9, 11, 12); 53 (S1, 1 to 9, 11, 12); 54 (S1, 1, 2, 4, 6 to 9, 11, 12); 55 (S2, 1 to 4, 6 to 9)
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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 : 36 (s1, 1-12); 37 (s1, 1-12)
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