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Portico
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Preserved
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2026-04-16
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Preserved : 1993: 1(1-2), 1994: 2(3-4), 1995: 3(5-6), 1996: 4(7-8), 1997: 5(9-10), 1998: 6(11-12), 1999: 7(13-14), 2000: 8(15-16), 2001: 9(17-18), 2002: 10(19-20), 2003: 11(21-22), 2004: 12(23-24), 2005: 13(25-26), 2006: 14(27-28), 2007: 15(29-30), 2008: 16(31-32), 2009: 17(33-34), 2010: 18(35-36), 2011: 19(37-38), 2012: 20(39-40), 2013: 21(41-42), 2014/2015: 22(43-44), 2015: 23(45-46), 2016: 24(47-48)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1, 2); 2 (3, 4); 3 (5, 6); 4 (7, 8); 5 (9, 10); 6 (11, 12); 7 (13, 14); 8 (15, 16); 9 (17, 18); 10 (19, 20); 11 (21, 22); 12 (sup24, 23, 24); 13 (25, 26); 14 (27, 28); 15 (sup29, 29, 30); 16 (sup31, 31, 32); 17 (33, 34); 18 (35, 36); 19 (37, 38); 20 (sup39, 39, 40); 21 (41, 42); 22 (Supplement, 43, 44); 23 (45, 46); 24 (47, 48); 25 (sup1, 50); 26 (52, 53)
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CLOCKSS Archive
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Preserved
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2026-04-13
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13, 17 to 24
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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 (2, 19); 2 (sup39, 4, 39); 5 (1, 9); 6 (11, 12); 7 (13, 14); 8 (15, 16); 9 (17, 18); 11 (21, 22); 12 (sup24, 23, 24); 13 (25, 26); 14 (27, 28); 15 (sup29, 3, 29); 16 (sup31, 31, 32); 17 (33, 34); 18 (35, 36); 19 (37, 38); 21 (41, 42); 22 (sup44, 43, 44); 23 (45, 46); 24 (47, 48); 25 (sup1, 5, 49, 51); 26 (52 to 54)
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 26
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LOCKSS Archive
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Preserved
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2026-04-13
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1 to 26
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Portico
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Preserved
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2026-04-16
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Preserved : 2001: 9(17-18), 2002: 10(19-20), 2003: 11(21-22), 2004: 12(23-24), 2005: 13(25-26), 2006: 14(27-28), 2007: 15(29-30), 2008: 16(31-32), 2009: 17(33-34), 2010: 18(35-36), 2011: 19(37-38), 2012: 20(39-40), 2013: 21(41-42), 2014: 22(43-44), 2015: 23(45-46), 2016: 24(47-48), 2017: 25(sup1, 49-51), 2018: 26(52-54)
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Library of Congress
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Preserved
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2025-04-07
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18 (35, 36); 19 (37, 38); 20 (sup39, 39, 40); 21 (41, 42); 22 (sup44, 43, 44); 23 (45, 46); 24 (47, 48); 25 (sup1, 49 to 51); 26 (52, 53)
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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 : 1 (2); 2 (3, 4); 3 (5, 6); 4 (7, 8); 5 (9, 10); 6 (11, 12); 7 (13, 14); 8 (15, 16); 9 (17, 18); 10 (19, 20); 11 (21, 22); 12 (23, 24); 13 (25, 26); 14 (27, 28); 15 (29, 30); 16 (31, 32); 17 (33, 34); 18 (35, 36); 19 (37, 38); 20 (39, 40); 21 (41, 42); 22 (43, 44); 23 (45, 46); 24 (47, 48)
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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 : 3 (1); 27 (2, 3); 28 (1 to 3); 29 (1 to 3); 31 (2)
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