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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (s1, 1 to 6); 2 (1 to 6); 3 (S2, 1 to 6); 4 (1 to 4, 5‐6); 5 (1 to 6); 6 (1 to 6); 7 (s3, 1 to 6); 8 (s4, 1 to 6); 9 (s5, 1 to 6); 13 (Supplement, 2 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (s1, 1 to 6); 19 (1 to 6); 20 (1 to 6); 21 (1)
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Portico
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Preserved
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2026-04-16
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Preserved : 1987/1988: 1(1-6), 1989: 2(1-6), 1990: 3(1-2, S2, 3-6), 1991: 4(1-6), 1992: 5(1-6), 1993: 6(1-6), 1994: 7(1-6), 1995: 8(1-6), 1996: 9(1-6), 1997: 10(1-6)
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CLOCKSS Archive
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Preserved
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2026-04-13
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4 to 20
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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 : 1 (1?2, 3 to 6); 2 (1 to 6); 11 (1 to 6); 12 (, 1 to 6); 13 (, 1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (, 1 to 6); 19 (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 : 1 (1?2, 3 to 6); 2 (1 to 6); 11 (1 to 6); 12 (, 1 to 6); 13 (, 1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (, 1 to 6); 19 (1 to 6)
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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 : 19 (1-6); 20 (1-5)
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