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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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2026-04-09
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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 : 7 (1 to 9, 11, 12); 8 (1, 2, 4 to 9, 11, 12); 71 (1 to 9, 11, 12); 74 (1, 4 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 9, 11, 12); 79 (1 to 9, 11, 12); 81 (1 to 7)
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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 : 7 (1 to 9, 11, 12); 8 (1, 2, 4 to 9, 11, 12); 71 (1 to 9, 11, 12); 74 (1, 4 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 9, 11, 12); 79 (1 to 9, 11, 12); 81 (1 to 7, 9, 11)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 70 (2 to 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 : 70 (1-12); 71 (1-12); 72 (1-12); 73 (1-12); 74 (1-12); 75 (1-11); 98 (23)
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