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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 15 (23‐24); 19 (, 11‐12, 13, 14‐18, 19‐25, 26‐29, 30); 39 (, 1); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1); 43 (, 1 to 4); 44 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 4); 48 (, 4); 49 (, 1 to 6); 50 (, 1 to 3, 4-5, 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 3, 4-5, 6); 54 (, 1 to 6); 55 (, 1, 2, 4 to 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 3, 4‐5, 6); 59 (, 1‐2, 3, 4-5); 60 (, 1-2, 3, 4-5, 6); 61 (, 1-2, 3, 4-5, 6); 62 (, 1-2, 3, 4-5, 6); 63 (, 1-2, 3-4, 6); 64 (, 1-2, 3, 4-5, 6); 65 (, 1 to 4); 66 (, 1 to 4); 67 (, 1 to 4); 68 (, 1 to 4); 69 (, 1 to 4); 70 (, 1 to 4); 71 (, 1); 1969; 1973; 1993; 1994; 1995; 1996; 1997; 1998; 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; 2025
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Portico
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Preserved
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2026-02-12
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Preserved : 1955: 1(1-4), 1956: 2(1-20), 1957: 3(1-21), 1958: 4(1-20), 1959: 5(1-24), 1960: 6(1-22), 1961: 7(1-20), 1962: 8(1-4), 1963: 9(1-23), 1964: 10(1-18), 1965: 11(1-4), 1966: 12(1), 1967: 13(1-20), 1968: 14(1-30), 1969: 15(1-29), 1970: 16(1-8), 1971: 17(1), 1972: 18(1-30), 1973: 19(1-30), 1974: 20(1-36), 1975: 21(1), 1976: 22(1), 1977: 23(1-36), 1978: 24(1-36), 1979: 25(1-33), 1980: 26(1-36), 1981: 27(1-36), 1982: 28(1-38), 1983: 29(1-11), 1984: 30(1-36), 1985: 31(1-36), 1986: 32(1-36), 1987: 33(1-6), 1988: 34(1-6), 1989: 35(1-6), 1990: 36(1-6), 1991: 37(1-35), 1992: 38(1), 1993: 39(1), 1994: 40(1-4), 1995: 41(1-4), 1996: 42(1), 1997: 43(1-4), 1998: 44(1-4), 1999: 45(1-4), 2000: 46(1-4), 2001: 47(1-4), 2002: 48(1, S 1, 2-4), 2003: 49(1-6), 2004: 50(1-6), 2005: 51(1-6), 2006: 52(1-6), 2007: 53(1-6), 2008: 54(1-6), 2009: 55(1-6), 2010: 56(1-6), 2011: 57(1-6), 2012: 58(1-6), 2013: 59(1-6), 2014: 60(1-6), 2015: 61(1-6), 2016: 62(1-6), 2017: 63(1-6), 2018: 64(1-6), 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(1-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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15, 19, 37 to 48, 51 to 71
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.43:1-4;vol.44:1-4;vol.45:1-4;vol.46:1-4;vol.47:1-4;vol.48:1-4,S1;vol.49:1-6;vol.50:1-3,6,4-5;vol.51:1-6;vol.52:1-6;vol.53:1-3,6,4-5;vol.54:1-6;vol.55:1-6;vol.56:1-6;vol.57:1-6;vol.58:3-3,6,1-2,4-5;vol.59:3-3,6,1-2,4-5;vol.60:3-3,6,1-2,4-5;vol.61:3-3,6,1-2,4-5;vol.62:3-3,6,1-2,4-5;vol.63:5-6,1-2,3-4;vol.64:3-3,6,1-2,4-5;vol.65:1-4;vol.66:1-3
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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 : 5 (2, 3, 4?5, 6); 6 (1-2, 3, 4-5, 6); 7 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (S1, 1 to 4); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 3, 4?5, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1?2, 3, 4?5, 6); 59 (1?2, 3, 4-5, 6); 61 (1-2, 3, 4-5, 6); 62 (1-2, 3, 4-5, 6); 63 (1-2, 3-4, 5, 6); 64 (1-2, 3, 4-5, 6); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1)
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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 : 5 (2, 3, 4?5, 6); 6 (1-2, 3, 4-5, 6); 7 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (S1, 1 to 4); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 3, 4?5, 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1?2, 3, 4?5, 6); 59 (1?2, 3, 4-5, 6); 61 (1-2, 3, 4-5, 6); 62 (1-2, 3, 4-5, 6); 63 (1-2, 3-4, 5, 6); 64 (1-2, 3, 4-5, 6); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1)
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