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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 63; 65; 66; 67; 68; 69
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Portico
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Preserved
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2026-05-28
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Preserved : 2009: 55(2009, ), 2010: 56(2010, ), 2011: 57(2011, ), 2012: 58(1), 2013: 59(1), 2014: 60(1), 2015: 61(1), 2016: 62(1), 2017: 63(1), 2019: 64(1), 2019: 65(1), 2021: 66(1), 2022: 67(1), 2022: 68(1), 2025: 69(1)
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Library of Congress
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Preserved
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2025-04-07
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60 (1); 61 (1); 62 (1); 63 (1); 64 (1); 67 (1); 68 (1)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 6; 55 (29); 56 (21); 57 (211); 58 (1); 59; 61; 62; 63; 64; 65; 66; 67
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