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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 27 (1); 30 (2 to 4); 31 (1 to 4); 32 (S1, 1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (s1, 1 to 4); 38 (s1, 1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1, 4); 42 (1 to 4); 43 (S1, 1 to 4); 44 (1 to 4); 45 (S1, 1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (S1, 1 to 4); 51 (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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1 to 40
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.25:1-4;vol.26:1-4;vol.27:1-4;vol.28:1-4;vol.29:1-4;vol.30:1-4;vol.31:1-4;vol.32:1-4,S1;vol.33:1-4;vol.34:1-4;vol.35:1-4;vol.36:1-4;vol.37:1-4,sup.s1;vol.38:1-4,sup.s1;vol.39:1-4;vol.40:1-4;vol.41:1-4;vol.42:1-4;vol.43:1-4,sup.S1;vol.44:1-4;vol.45:1-4,sup.S1;vol.46:1-4
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CLOCKSS Archive
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Preserved
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2026-04-06
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25 to 52
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Portico
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Preserved
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2026-04-09
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Preserved : 2001: 27(1-4), 2002: 28(1-4), 2003: 29(1-4), 2004: 30(1-4), 2005: 31(1-4), 2006: 32(1-4), 2007: 33(1-4), 2008: 34(1-4), 2009: 35(1-4), 2010: 36(1-4), 2011: 37(1-4), 2012/2013: 38(1-4), 2013: 39(1-4), 2014: 40(1-4), 2015: 41(1-4), 2016: 42(1-4), 2017: 43(1, S1, 2-4), 2018: 44(1-4), 2019: 45(1, S1, 2-4), 2020: 46(1-4), 2021: 47(1-4), 2022: 48(1-4), 2023: 49(1-4), 2024: 50(1, S 1, 2, S 2, 3-4), 2025: 51(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 : 32 (1-4); 33 (1-4)
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