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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 to 3); 2 (, 1 to 3); 3 (, 1 to 3); 1980; 1981; 1982
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Portico
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Preserved
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2026-02-12
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Preserved : 1980: 1(1-3), 1981: 2(1-3), 1982: 3(1-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 47
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 27 (5, 6); 28 (, 4); 2006; 2007
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Library of Congress
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Preserved
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2025-04-07
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39 (1 to 6); 40 (1 to 6); 41 (1, 2-3, 4, 5-6); 42 (1-2, 3-4, 5-6); 43 (1, 2-3, 4, 5-6); 44 (1 to 6); 45 (1 to 5)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 18 (1, 3, 4); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 4, 6); 24 (1 to 6); 25 (1 to 5); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1, 2-3, 4, 5-6); 42 (1-2, 3-4, 5-6); 43 (1, 2-3, 4, 5-6); 44 (1 to 6); 45 (1 to 6)
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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 : 2 (1 to 6); 3 (1 to 6); 4 (1 to 6); 18 (1, 3, 4); 19 (1 to 6); 21 (1 to 6); 22 (1 to 6); 23 (1 to 4, 6); 24 (1 to 6); 25 (1 to 5); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1, 2-3, 4, 5-6); 42 (1-2, 3-4, 5-6); 43 (1, 2-3, 4, 5-6); 44 (1 to 6); 45 (1 to 6)
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