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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.70:1-12;vol.71:1-12;vol.72:1-12;vol.73:1-12;vol.74:1-12;vol.75:1-12;vol.76:1-12
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Portico
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Preserved
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2026-02-12
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Preserved : 2014: 70(1-12), 2015: 71(1-12), 2016: 72(1-12), 2017: 73(1-12), 2018: 74(1-12), 2019: 75(1-12), 2020: 76(1-12), 2021: 77(1-12), 2022: 78(1-12), 2023: 79(1-12), 2024: 80(1-12), 2025: 81(1-12), 2026: 82(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 : 8 (1 to 3, 5 to 9, 11, 12); 74 (1, 3 to 9, 11, 12); 75 (1, 2, 4 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (1 to 9, 11, 12); 78 (1 to 8, 11, 12); 79 (1 to 9, 11, 12); 81 (1 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 : 8 (1 to 3, 5 to 9, 11, 12); 74 (1, 3 to 9, 11, 12); 75 (1, 2, 4 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (1 to 9, 11, 12); 78 (1 to 8, 11, 12); 79 (1 to 9, 11, 12); 81 (1 to 9)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 39 (1 to 12); 40 (, 1 to 12); 41 (, 1 to 12); 42 (, 1 to 12); 43 (, 1 to 12); 44 (, 1 to 12); 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); 55 (, 12); 56 (, 1 to 12); 57 (, 2 to 12); 58 (, 1 to 12); 60 (, 1 to 12); 61 (, 1 to 12); 62 (, 1 to 12); 63 (, 1 to 12); 64 (, 5 to 12); 65 (, 1 to 12); 66 (, 1, 2, 4 to 12); 67 (, 1 to 12); 68 (, 1 to 12); 69 (, 1 to 12); 70 (, 1 to 12); 71 (, 1); 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1999; 2000; 2001; 2002; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015
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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 : 70 (1-12); 71 (1-12); 72 (1-12); 73 (1-12); 74 (1-12); 75 (1-11)
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Library of Congress
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Preserved
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2025-04-07
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70 (1 to 12); 71 (1 to 6); 73 (9, 10, 12); 74 (3 to 11); 75 (1 to 8, 11); 76 (1 to 4, 7, 9, 11, 12); 77 (1, 3 to 12); 78 (1 to 12); 79 (1, 8 to 11); 80 (4, 5)
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