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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 6 (1 to 4); 22 (1 to 4, 5-6); 23 (1 to 4, 5-6); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1, 2-3, 4); 29 (1-2, 3, 4); 30 (1 to 4); 31 (1‐2, 3‐4); 32 (1-2, 3pt4); 34 (1-2, 3-4); 35 (1-2, 3, 4); 36 (1-2, 3-4); 37 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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7 to 12
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.22:1-4,5-6;vol.23:1-4,5-6;vol.24:1-4;vol.25:1-4;vol.26:1-4;vol.27:1-4;vol.28:1-1,4,2-3;vol.29:3-4,1-2;vol.30:1-4;vol.31:1-2,3-4;vol.32:1-2,3-4;vol.33:1-2,3-4;vol.34:1-2,3-4;vol.35:3-4,1-2;vol.36:1-2,3-4;vol.37:1-4
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CLOCKSS Archive
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Preserved
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2026-04-27
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22 to 37
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Portico
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Preserved
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2026-04-23
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Preserved : 2012: 32(1pt2, 3-4), 2013: 33(1-4), 2014/2015: 34(1-4), 2015: 35(1-4), 2016: 36(1-4), 2017: 37(1-4)
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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 : 26 (1-4); 27 (1-3)
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Library of Congress
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Preserved
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2025-04-07
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9 (4); 34 (3-4); 35 (1-2, 3, 4); 36 (1-2); 37 (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 : 3 (1 to 4); 22 (1 to 4, 5‐6); 23 (1 to 4, 5‐6); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1, 2?3, 4); 29 (1‐2, 3, 4); 31 (1?2, 3?4); 32 (1-2, 3-4); 33 (1-2, 3-4); 34 (1-2, 3-4); 35 (1-2, 3, 4); 36 (1-2, 3-4); 37 (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 : 3 (1 to 4); 22 (1 to 4, 5‐6); 23 (1 to 4, 5‐6); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1, 2?3, 4); 29 (1‐2, 3, 4); 31 (1?2, 3?4); 32 (1-2, 3-4); 33 (1-2, 3-4); 34 (1-2, 3-4); 35 (1-2, 3, 4); 36 (1-2, 3-4); 37 (1 to 4)
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