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Portico
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Preserved
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2026-04-30
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Preserved : 2008: 28(1-4), 2009: 29(1-4), 2010: 30(1-4), 2011: 31(1-4), 2012: 32(1-4), 2013: 33(1-6), 2014: 34(1-3)
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CLOCKSS Archive
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Preserved
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2026-04-27
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28 to 38
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 28 (1 to 4); 29 (1 to 4); 30 (1 to 4); 31 (1 to 4); 32 (2 to 4); 33 (1 to 6); 34 (1, 3 to 6); 35 (1 to 6); 36 (1 to 3, 5, 6); 37 (1, 2, 4 to 6); 38 (1 to 6)
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Portico
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Preserved
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2026-04-30
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Preserved : 2015: 35(3-6), 2016: 36(1-6), 2017: 37(1-6), 2018: 38(1-6)
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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 : 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6)
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