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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 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1-2, 3-4); 5 (1-2, 3, 4); 6 (1-2, 3-4); 7 (1-2, 3-4); 11 (1 to 4); 12 (1 to 4); 13 (1-4); 14 (3-4); 15 (1, 2, 3-4); 16 (1-4); 17 (3-4); 18 (1-2, 3-4); 19 (1-2, 3-4); 20 (1-2, 3-4); 21 (1-2, 3-4); 22 (1-4); 23 (3-4); 24 (1-4); 25 (3-4); 26 (1-2, 3-4); 27 (1-2, 3-4); 28 (1-4); 29 (3-4); 30 (1-2, 3-4); 31 (1-4); 32; 33 (3-4); 34 (1, 2, 3-4); 35 (1-4); 36 (3-4); 37 (1-2, 3-4); 38 (1-2, 3-4); 39 (1-2, 3-4); 40 (1-2, 3-4); 41 (1-2, 3-4); 42 (1-2, 3-4); 43 (1-2, 3-4); 44 (1-2, 3-4); 45 (1-2, 3-4); 46 (1-2, 3-4); 47 (1, 2-3, 4); 48 (1 to 4); 49 (1 to 4); 50 (1, 2, 3-4); 51 (1-2, 3 to 12); 52 (1 to 10, 11-12); 53 (1 to 12); 54 (1 to 12); 55 (1 to 12); 56 (1 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 12); 60 (1 to 14); 61 (1 to 4, 10, 13, 14); 62 (1 to 14); 63 (1 to 18); 64 (1 to 18); 65 (1 to 8, 11 to 18); 66 (1 to 18); 67 (5 to 14, 16 to 18); 68 (1-3, 4 to 18); 69 (1 to 18); 70 (1 to 18); 71 (1 to 18); 72 (1 to 18); 73 (1 to 18); 74 (1 to 18); 75 (1 to 7)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 73
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CLOCKSS Archive
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Preserved
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2026-04-06
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57 to 66
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LOCKSS Archive
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In Progress
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2026-04-06
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74, 75
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Portico
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Preserved
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2026-04-09
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Preserved : 1972/1973: 2(1-4), 1974/1975: 3(1-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1977: 5(3-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1980: 8(1, 4), 1981/1982: 9(1-4), 1983/1984: 10(1-4), 1985/1986/1987: 11(1-4), 1987/1988/1989: 12(1-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1990: 14(3-4), 1991: 15(1-2), 1992: 16(1-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1996: 33(3-4), 1996: 34(1-2), 1997: 35(1-4), 1997: 36(1-4), 1997: 37(1-4), 1997: 38(1-4), 1998: 39(1-4), 1998: 40(1-4), 1998: 41(1-4), 1998: 42(1-4), 1999: 43(1-4), 1999: 44(1-4), 2000: 45(1-4), 2000: 46(1-4), 2000: 47(1-4), 2000/2001: 48(1-4), 2001: 49(1-4), 2001: 50(1-4), 2002: 51(1-12), 2003: 52(1-12), 2004: 53(1-12), 2005: 54(1-12), 2005/2006: 55(1-12), 2007: 56(1-12), 2008: 57(1-12), 2009: 58(1-12), 2010: 59(1-12), 2011: 60(1-14), 2012: 61(1-14), 2013: 62(1-14), 2014: 63(1-18), 2015: 64(1-18), 2016: 65(1-18), 2017: 66(1-18), 2018: 67(1-18), 2019: 68(1-18), 2020: 69(1-18), 2021: 70(1-18), 2022: 71(1-18), 2023: 72(1-18), 2024: 73(1-18), 2025: 74(1-18), 2026: 75(1-9)
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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 75
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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 (1 to 9, 11 to 18); 68 (1-3, 13); 71 (1 to 9, 11 to 18); 72 (1 to 9, 11 to 18); 73 (1 to 9, 11 to 18); 74 (1 to 7, 9)
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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 (1-4); 3 (1-4); 4 (3-4); 5 (1-2, 3, 4); 6 (1-2, 3-4); 7 (1-2, 3-4); 8 (1, 2-3, 4); 9 (1, 2, 3-4); 10 (1-4); 11 (1-4); 12 (1-4); 13 (1-4); 14 (3-4); 15 (1, 2, 3-4); 16 (1-4); 17 (3-4); 18 (1-2, 3-4); 19 (1-2, 3-4); 20 (1-2, 3-4); 21 (1-2, 3-4); 22 (1-4); 23 (3-4); 24 (1-4); 25 (3-4); 26 (1-2, 3-4); 27 (1-2, 3-4); 28 (1-4); 29 (3-4); 30 (1-2, 3-4); 31 (1-4); 32; 33 (3-4); 34 (1, 2, 3-4); 35 (1-4); 36 (3-4); 37 (1-2, 3-4); 38 (1-2, 3-4); 39 (1-2, 3-4); 40 (1-2, 3-4); 41 (1-2, 3-4); 42 (1-2, 3-4); 43 (1-2, 3-4); 44 (1-2, 3-4); 45 (1-2, 3-4); 46 (1-2, 3-4); 47 (1, 2-3, 4); 48 (1-4); 49 (1-4); 50 (1, 2, 3-4); 51 (1-2, 3-12); 52 (1-10, 11-12); 53 (1-12); 54 (4, 8); 55 (9-12); 56 (1-12); 57 (1-12)
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Library of Congress
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Preserved
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2025-04-07
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59 (3 to 12); 60 (1 to 14); 61 (1 to 14); 62 (1 to 14); 63 (1 to 18); 64 (1 to 18); 65 (1 to 18); 66 (1 to 18); 67 (1 to 18); 68 (4 to 18); 69 (1 to 18); 70 (1 to 18); 71 (1 to 18); 72 (1 to 18); 73 (1 to 18)
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