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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); 2; 3; 4; 5; 6; 12; 13; 14; 15; 16; 17; 18; 19; 20; 22; 23; 24; 25; 27; 28 (2); 29 (1, 2); 30 (1, 2); 31; 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39; 40 (1, 2); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 50 (1, 2); 51 (1 to 3); 52 (1 to 3)
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LOCKSS Archive
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Preserved
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2026-05-25
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1 to 20, 22 to 51
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CLOCKSS Archive
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Preserved
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2026-05-25
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ahead-of-print to 20, 22 to 42, 44 to 52
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LOCKSS Archive
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In Progress
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2026-05-25
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52, 53
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Portico
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Preserved
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2026-05-21
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Preserved : 1974: 1(1), 1975: 2(1), 1976: 3(1), 1977: 4(1), 1978: 5(1), 1979: 6(1), 1980: 7(1), 1981: 8(1), 1982: 9(1), 1983: 10(1), 1984: 11(1), 1985: 12(1), 1986: 13(1), 1987: 14(1), 1988: 15(1), 1989: 16(1), 1990: 17(1), 1991: 18(1), 1992: 19(1), 1993: 20(1)
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Portico
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Preserved
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2026-05-21
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Preserved : 1995: 22(1), 1996: 23(1), 1997: 24(1), 1998: 25(1), 1999: 26(1), 2000: 27(1), 2001: 28(1-2), 2002: 29(1-2), 2003: 30(1-2), 2004: 31(1-2), 2005: 32(1-2), 2006: 33(1-2), 2007: 34(1-2), 2008: 35(1-2), 2009: 36(1-2), 2010: 37(1-2), 2011: 38(1-2), 2012: 39(1-2), 2013: 40(1-2), 2014: 41(1-3), 2015: 42(1-3), 2016: 43(1-3), 2017: 44(1-3), 2018: 45(1-3), 2019: 46(1-3), 2020: 47(1-3), 2021: 48(1-3), 2022: 49(1-3), 2023: 50(1-3), 2024: 51(1-3), 2025: 52(1-3), 2026: 53(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, 2); 4 (1, 2); 5 (1 to 3); 24 (1); 25; 26; 27; 28 (2); 29 (1, 2); 31 (1, 2); 32 (1, 2); 33 (1, 2); 34 (1, 2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1, 2); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 51 (1 to 3); 52 (1)
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Library of Congress
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Preserved
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2025-04-07
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37 (1, 2); 38 (1, 2); 39 (1, 2); 40 (1, 2); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 3); 50 (1 to 3); 51 (1 to 3)
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