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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1-4); 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18 (2 to 4); 19 (1-4); 20; 21; 22; 28; 29; 30 (3, 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1, 2, 3-4); 36 (1-2, 3, 4); 37 (1 to 4); 38 (1-2, 3, 4); 39 (1, 2, 3-4); 40 (1 to 4); 41 (1 to 4); 42 (1, 2, 3-4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1, 2, 4 to 6); 56 (1, 2-3, 4 to 6); 57 (1 to 4, 5-6); 58 (1 to 6, 7-8); 59 (1 to 6, 7-8); 60 (1-2, 3 to 8); 61 (1, 3, 4, 5-6, 7, 8); 62 (1 to 8, 9-10); 63 (1, 2, 3-4, 5 to 8, 9-10); 64 (1-2, 3, 4, 5-6, 7 to 10); 65 (1 to 10); 66 (1 to 10); 67 (1, 2, 4 to 10); 68 (1 to 10); 69 (1, 2)
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Internet Archive
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Preserved
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2025-08-08
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1 to 52
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Portico
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Preserved
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2026-04-09
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Preserved : 1979: 22(1-4), 1980: 23(1-4), 1981: 24(1-4), 1982: 25(1-4), 1983: 26(1-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1987: 30(3-4), 1988: 31(1-4), 1989: 32(1-4), 1990: 33(1-4), 1991: 34(1-4), 1992: 35(1-2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1993: 36(3-4), 1994: 37(1-4), 1995: 38(3-4), 1996: 39(1-2), 1997: 40(1-4), 1998: 41(1-4), 1999: 42(1-2), 2000: 43(1-4), 2001: 44(1-4), 2002: 45(1-4), 2003: 46(1-4), 2004: 47(1-6), 2005: 48(1-6), 2006: 49(1-6), 2007: 50(1-6), 2008: 51(1-6), 2009: 52(1-6), 2010: 53(1-6), 2011: 54(1-6), 2012: 55(1-6), 2013: 56(1-6), 2014: 57(1-6), 2015: 58(1-8), 2016: 59(1-8), 2017: 60(1-8), 2018: 61(1-8), 2019: 62(1-10), 2020: 63(1-10), 2021: 64(1-10), 2022: 65(1-9), 2023: 66(1-10), 2024: 67(1-10), 2025: 68(1-10), 2026: 69(1-3)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 67
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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 68
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LOCKSS Archive
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In Progress
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2026-04-06
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68, 69
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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; 15; 16; 17; 18 (2-4); 19 (1-4); 20 (3); 21 (1-4); 22; 23 (2-4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28; 29; 30 (3, 4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1, 2, 3-4); 35 (1, 2, 3-4); 36 (1-2, 3, 4); 37 (1-4); 38 (1-2, 3, 4); 39 (1, 2, 3-4); 40 (1-4); 41 (1-4); 42 (1, 2, 3-4); 43 (1-4); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1-6); 48 (1-6); 49 (1-6); 50 (1-6); 51 (1-6)
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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 : 4 (1 to 4); 5 (1 to 6); 6 (1-2, 3 to 8); 41 (1 to 4); 42 (1, 2, 3-4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1, 2-3, 4 to 6); 57 (1 to 4, 5-6); 58 (1 to 6, 7-8); 59 (1 to 6, 7-8); 61 (1 to 4, 5-6, 7, 8); 62 (1 to 8, 9-1); 63 (1, 2, 3-4, 5 to 8, 9-1); 64 (1-2, 3, 4, 5-6, 7 to 9); 65 (1 to 9); 66 (1 to 9); 67 (1 to 9); 68 (1, 2)
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Library of Congress
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Preserved
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2025-04-07
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53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1, 2-3, 4 to 6); 57 (1 to 5-6); 58 (1 to 7-8); 59 (1 to 7-8); 60 (1-2, 3 to 8); 61 (1 to 5-6, 7, 8); 62 (1 to 9-10); 63 (1 to 3-4, 5 to 9-10); 64 (1-2, 3 to 5-6, 7 to 10); 65 (1 to 10); 66 (1 to 10); 67 (1 to 10)
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