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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14 (3-4); 15 (1, 2, 3-4); 16 (1-2, 3, 4); 17 (1, 2-3, 4); 18 (1-4); 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32 (3-4); 33 (1-4); 34; 35; 36; 37 (2); 38 (1-4); 40; 42; 44 (3-4); 45 (1-4); 46; 47 (2 to 4); 48 (3); 49 (1 to 3); 50 (1 to 4); 51 (1 to 4); 52 (1 to 3); 53 (1 to 3); 54 (1 to 3); 55 (1 to 4); 56 (1, 2); 57 (1, 2, 3-4); 58 (1 to 4); 59 (1-2, 3, 4); 60 (1, 2, 3-4); 61 (1-2, 3, 4); 62 (1, 2, 3-4); 63 (1, 2, 3-4); 64 (1 to 4); 65 (1 to 4); 66 (1, 2-3, 4); 67 (1 to 4); 68 (1 to 4); 69 (1, 2, 3-4); 70 (1-2, 3, 4); 71 (1-2, 3, 4); 72 (1-2, 3, 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1-2, 3, 4); 77 (1-2, 3, 4); 78 (1 to 4); 79 (1 to 4); 80 (1 to 4); 81 (1, 3, 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1 to 4); 88 (1 to 4); 89 (1 to 4); 90 (1 to 4); 91 (1 to 4); 92 (1 to 4); 93 (1 to 4); 94 (1, 2)
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Portico
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Preserved
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2026-04-02
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Preserved : 1960: 29(1-4)
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Portico
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Preserved
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2026-04-02
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Preserved : 1968: 37(1-2)
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Portico
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Preserved
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2026-04-02
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Preserved : 1978: 47(1-4), 1979: 48(1-3), 1980: 49(1-3)
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Portico
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Preserved
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2026-04-02
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Preserved : 1981: 50(1-4), 1982: 51(1-4), 1983: 52(1-3), 1984: 53(1-3)
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Portico
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Preserved
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2026-04-02
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Preserved : 1985: 54(1-4), 1986: 55(1-4), 1987: 56(1-4), 1988: 57(1-2)
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Portico
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Preserved
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2026-04-02
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Preserved : 1989: 58(1-4), 1990: 59(3-4), 1991: 60(1-2), 1992: 61(3-4), 1993: 62(1-2), 1994: 63(1-2), 1995: 64(1-4), 1996: 65(1-4), 1997: 66(1-4), 1998: 67(1-4), 1999: 68(1-4), 2000: 69(1-4)
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Portico
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Preserved
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2026-04-02
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Preserved : 2001: 70(1-4), 2002: 71(1-4), 2003: 72(1-4), 2004: 73(1-4), 2005: 74(1-4), 2006: 75(1-4), 2007: 76(1-4), 2008: 77(1-4), 2009: 78(1-4), 2010: 79(1-4), 2011: 80(1-4), 2012: 81(1-4), 2013: 82(1-4), 2014: 83(1-4), 2015: 84(1-4), 2016: 85(1-4), 2017: 86(1-4), 2018: 87(1-4), 2019: 88(1-4), 2020: 89(1-4), 2021: 90(1-4), 2022: 91(1-4), 2023: 92(1-4), 2024: 93(1-4), 2025: 94(1-2)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 93
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CLOCKSS Archive
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Preserved
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2026-04-06
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ahead-of-print to 94
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LOCKSS Archive
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In Progress
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2026-04-06
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94
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Library of Congress
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Preserved
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2025-04-07
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79 (1 to 4); 80 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1 to 4); 88 (1 to 4); 89 (1 to 4); 90 (1 to 4); 91 (1 to 4); 92 (1 to 4); 93 (1)
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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 (1-4); 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14 (3-4); 15 (1, 2, 3-4); 16 (1-2, 3, 4); 17 (1, 2-3, 4); 18 (1-4); 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32 (3-4); 33 (1-4); 34; 35; 36; 37 (2); 38 (1-4); 39; 40; 41; 42; 43; 44 (3-4); 45 (1-4); 46; 47 (2-4); 48 (1-3); 49 (1, 3); 50 (1-4); 51 (1, 3, 4); 52 (1-3); 53 (1-3); 54 (1-4); 55 (1-4); 56 (1-4); 57 (1, 2, 3-4); 58 (1-4); 59 (1-2, 3, 4); 60 (1, 2, 3-4); 61 (1-2, 3, 4); 62 (1, 2, 3-4); 63 (1, 2, 3-4); 64 (1-4); 65 (1-3); 66 (1, 2-3, 4); 67 (1-4); 68 (1-4); 69 (1, 2, 3-4); 70 (1-2, 3, 4); 71 (1-2, 3); 72 (1-2, 3, 4); 73 (1-4); 74 (1-4); 75 (1-4); 76 (1-2, 3, 4); 77 (1-2, 3, 4)
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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 : 7 (3, 4); 8 (1 to 4); 9 (1 to 4); 66 (1, 2-3, 4); 67 (1 to 4); 68 (1 to 4); 69 (1, 2, 3-4); 71 (1-2, 3, 4); 72 (1-2, 3, 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1-2, 3, 4); 77 (1-2, 3, 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1 to 4); 88 (1 to 4); 89 (1 to 4); 91 (1 to 4); 92 (1 to 4); 93 (1, 2)
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