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Swiss National Library
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Preserved
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2020-01-08
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1 (1, 2); 2 (1, 2); 3 (1, 2); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4, 6)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1, 2); 2 (, 1, 2); 3 (, 1, 2); 4 (, 1 to 4); 5 (, 1 to 4); 8 (, 4); 9 (, 4 to 6); 10 (, 1 to 3, 5, 6); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1 to 3); 2013; 2014; 2015; 2016; 2017; 2020; 2021; 2022; 2023; 2024; 2025
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Portico
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Preserved
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2026-02-12
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Preserved : 2013: 1(1-2), 2014: 2(1-2), 2015: 3(1-2), 2016: 4(1-4), 2017: 5(1-4), 2018: 6(1-4), 2019: 7(1-6), 2020: 8(1-2, 4-6), 2021: 9(1-6), 2022: 10(1-3, 5-6), 2023: 11(1-6), 2023/2024: 12(1-6), 2025: 13(1-6)
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