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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 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1 to 3); 5 (1); 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33 (2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 40 (1, 2); 41 (1, 2); 42 (1, 2); 43 (1, 2); 44 (1, 2); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (2, 3); 50 (1 to 3)
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LOCKSS Archive
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Preserved
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2026-04-06
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35 to 37
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CLOCKSS Archive
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Preserved
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2026-04-06
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35 to 40
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Portico
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Preserved
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2026-04-09
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Preserved : 1971/1972: 1(1-4), 1973/1974: 2(1-4), 1975/1976: 3(1-4), 1977/1978: 4(1-3), 1979: 5(1), 1981: 6(1), 1982: 7(1), 1983: 8(1), 1984: 9(1), 1985: 10(1), 1986: 11(1), 1987: 12(1), 1988: 13(1), 1989: 14(1), 1990: 15(1), 1991: 16(1), 1992: 17(1), 1993: 18(1), 1994: 19(1), 1995: 20(1), 1996: 21(1), 1997: 22(1), 1998: 23(1), 1999: 24(1), 2000: 25(1), 2001: 26(1), 2002: 27(1), 2003: 28(1), 2004: 29(1), 2005: 30(1), 2006: 31(1), 2007: 32(1), 2008: 33(1-2), 2009: 34(1-2), 2010: 35(1-2), 2011: 36(1-2), 2012: 37(1-2), 2013: 38(1-2), 2014: 39(1-2), 2015: 40(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 49
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 50
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LOCKSS Archive
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In Progress
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2026-04-06
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50
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Portico
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Preserved
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2026-04-09
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Preserved : 2006: 31(1), 2007: 32(1), 2008: 33(1-2), 2009: 34(1-2), 2010: 35(1-2), 2011: 36(1-2), 2012: 37(1-2), 2013: 38(1-2), 2014: 39(1-2), 2015: 40(1-2), 2016: 41(1-2), 2017: 42(1-2), 2018: 43(1-2), 2019: 44(1-2), 2020: 45(1-3), 2021: 46(1-3), 2022: 47(1-3), 2023: 48(1-3), 2024: 49(1-3), 2025: 50(1-3)
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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 : 42 (1, 2); 43 (1)
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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 : 42 (1, 2); 43 (1)
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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); 4 (2); 22 (1); 23; 24; 25; 26; 27; 28; 29; 31; 32; 33 (2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 41 (1, 2); 42 (1, 2); 43 (1, 2); 44 (1, 2); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3)
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Library of Congress
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Preserved
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2025-04-07
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42 (1, 2); 43 (1, 2); 44 (1, 2); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1, 2)
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