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Portico
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Preserved
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2026-02-12
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Preserved : 2014: 2, 2015: 3, 2016: 4, 2017: 5(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 2019: 7
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Portico
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Preserved
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2026-02-12
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Preserved : 2021: 9, 2022: 10, 2023: 11, 2024: 12, 2025: 13
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Public Knowledge Project PLN
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Preserved
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2026-02-12
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Preserved : 1; 2 (1); 3; 4; 5 (1, 2); 7; 9; 11; 12; 13; 14
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1; 2; 3; 4; 5 (1, 2); 6; 7; 8; 9; 10; 11; 12; 13; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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