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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.69:1-6;vol.70:1-6;vol.71:1-6;vol.72:1-6;vol.73:1-6;vol.74:1-6;vol.75:1-6;vol.76:1-6
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Internet Archive
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Preserved
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2025-08-08
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B25
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CLOCKSS Archive
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Preserved
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2026-02-09
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47 to 82
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Portico
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Preserved
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2026-02-12
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Preserved : 2013: 69(1-6), 2014: 70(1-6), 2015: 71(1-6), 2016: 72(1-6), 2017: 73(1-6), 2018: 74(1-6), 2019: 75(1-6), 2020: 76(1-6), 2021: 77(1-6), 2022: 78(1-6), 2023: 79(1-6), 2024: 80(1-6), 2025: 81(1-6), 2026: 82(1)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 24 (1 to 12); 25 (, 1 to 12); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1 to 12); 29 (, 1 to 12); 30 (, 2 to 8, 10 to 12); 31 (, 1 to 12); 32 (, 1 to 12); 33 (, 1 to 12); 34 (, 1 to 12); 35 (, 1 to 12); 36 (, 1 to 12); 37 (, 1 to 12); 38 (, 1 to 12); 39 (, 1 to 6); 40 (, 1 to 6); 41 (, 1 to 6); 42 (, 1 to 6); 43 (, 1 to 6); 44 (, 1 to 6); 45 (, 1 to 6); 46 (, 1 to 6); 47 (, 1 to 6); 48 (, 1 to 6); 49 (, 1 to 6); 50 (, 1 to 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1, 2 to 4 to 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 6); 64 (, 3 to 6); 65 (, 1 to 6); 66 (, 1 to 6); 67 (, 1 to 6); 68 (, 1 to 6); 69 (, 1 to 6); 70 (, 1 to 6); 81 (, 3); 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2025
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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 : 69 (3-6); 70 (1-6); 71 (1-6); 72 (1-6); 73 (1, 3-6); 74 (1-6); 75 (1-5)
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Library of Congress
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Preserved
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2025-04-07
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66 (1 to 3); 70 (1 to 6); 71 (1 to 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 : 8 (1 to 6); 69 (1 to 6); 76 (1, 3 to 6); 77 (1 to 6); 78 (1, 2 to 4 to 6); 79 (1 to 4, 6); 81 (1 to 4)
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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 : 8 (1 to 6); 69 (1 to 6); 76 (1, 3 to 6); 77 (1 to 6); 78 (1, 2 to 4 to 6); 79 (1 to 4, 6); 81 (1 to 5)
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