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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 57 (1 to 4); 58 (, 1 to 4); 59 (, 1 to 4); 60 (, 1 to 4); 61 (, 1 to 4); 62 (, 1 to 4); 63 (, 1 to 4); 64 (, 1 to 4); 65 (, 1 to 4); 66 (, 1 to 4); 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006
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Internet Archive
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Preserved
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2025-08-08
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1 to 74
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Portico
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Preserved
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2026-02-12
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Preserved : 1954: 14(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1960: 20(2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1966: 26(2), 1967: 27(1-2), 1968: 28(1-2)
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Portico
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Preserved
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2026-02-12
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Preserved : 1969: 29(2), 1970: 30(1), 1971: 31(1)
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Portico
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Preserved
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2026-02-12
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Preserved : 1974: 34(1-2)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1977: 37(3)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1979: 39(2-3), 1980: 40(1)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1981: 41(2)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1983: 43(1)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1984: 44(2), 1985: 45(2), 1986: 46(1-2), 1987: 47(2)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1989: 49(3), 1990: 50(2)
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Portico
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Preserved
|
2026-02-12
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Preserved : 1992: 52(4), 1993: 53(2, 4), 1994: 54(1, 3-4), 1995: 55(1-4), 1996: 56(1-3)
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Portico
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Preserved
|
2026-02-12
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Preserved : 2008: 68(2), 2009: 69(2), 2010: 70(1)
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Portico
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Preserved
|
2026-02-12
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Preserved : 2011: 71(2), 2012: 72(1)
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Portico
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Preserved
|
2026-02-12
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Preserved : 2015: 75(1)
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Portico
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Preserved
|
2026-02-12
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Preserved : 2016: 76(3-4), 2017: 77(1-4), 2018: 78(1-4), 2019: 79(1-4), 2020: 80(1-4), 2021: 81(1-4), 2022: 82(1-4), 2023: 83(1-4), 2024: 84(1-4), 2025: 85(1-4)
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LOCKSS Archive
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In Progress
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2026-02-09
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CLOCKSS Archive
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Preserved
|
2026-02-09
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57 to 85
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Library of Congress
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Preserved
|
2025-04-07
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76 (3, 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 80 (1 to 4); 81 (1 to 4); 83 (1 to 4); 84 (1 to 4)
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National Digital Preservation Program, China
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Preserved
|
2025-10-23
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Preserved : 84 (1 to 4)
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National Digital Preservation Program, China
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Preserved
|
2025-12-04
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Preserved : 84 (1 to 4)
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National Library of the Netherlands
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Preserved
|
2024-12-15
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Preserved : 57 (2-4); 58 (1-4); 59 (1-4); 60 (1-4); 61 (1-4); 62 (1-4); 63 (1-4); 64 (1-4); 65 (1-4); 66 (1-4)
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