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CLOCKSS Archive
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Preserved
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2026-05-11
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1 to 20
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (2 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 3); 9 (1, 3, 4); 10 (Supplement, 1 to 4); 11 (Supplement, 1 to 4); 12 (1 to 6); 13 (1 to 6); 14 (1 to 4); 15 (1 to 6); 16 (1 to 12); 17 (1 to 7, 9 to 12); 18 (2 to 11); 19 (1 to 12); 20 (1, 2)
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Portico
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Preserved
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2026-05-07
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Preserved : 2007: 1(1-4), 2008: 2(1-4), 2009: 3(1-4), 2010: 4(1-4), 2011: 5(1-4), 2012: 6(1-4), 2013: 7(1-4), 2014: 8(1-4), 2015: 9(1-4), 2016: 10(1-4), 2017: 11(1, S 1, 2, S 2, 3-4), 2018: 12(1-6), 2019: 13(1-6), 2020: 14(1-6), 2021: 15(1-6), 2022: 16(1-12), 2023: 17(1-12), 2024: 18(1-12), 2025: 19(1-12), 2026: 20(1-3)
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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 : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-4); 7 (1-4); 8 (1-4); 9 (1-4); 10 (1-4); 11 (S1, 1-4); 12 (1-4, 6); 13 (1-3)
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