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Internet Archive
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Preserved
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2025-08-08
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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); 2 (1, 2, 3-4); 3 (1 to 4); 4 (1 to 4); 5 (sup1, 1 to 4); 6 (sup2, 1 to 4); 7 (sup3, 1 to 4); 8 (sup4, 1 to 4); 9 (1 to 4); 10 (sup5, 1 to 4); 11 (sup6, 1 to 4); 12 (sup8, 1 to 4); 13 (1-2, 3-4); 19 (1); 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46 (2, 3-4); 47 (1, 2-3, 4); 48 (1-2); 49 (3-4); 50 (1 to 4); 51 (1 to 4); 52 (sup1, 1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (2 to 4); 59 (1 to 4); 60 (1)
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 58
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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 45, 48 to 59
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LOCKSS Archive
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In Progress
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2026-04-06
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59, 60
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Portico
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Preserved
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2026-04-02
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Preserved : 1967: 1(1-4), 1968: 2(1-4), 1969: 3(1-4), 1970: 4(1-4), 1971: 5(1-4), 1972: 6(1-4), 1973: 7(1-4), 1974: 8(1-4), 1975: 9(1-4), 1976: 10(1-sup5), 1977: 11(1-4, sup6-sup7), 1978: 12(1-4, sup8-sup9), 1979: 13(1-4), 1980: 14(1-4), 1981: 15(1-4), 1982: 16(1-4), 1983: 17(1), 1984: 18(1), 1985: 19(1), 1986: 20(1), 1987: 21(1), 1988: 22(1), 1989: 23(1), 1990: 24(1), 1991: 25(1), 1992: 26(1), 1993: 27(1), 1994: 28(1), 1995: 29(1), 1996: 30(1), 1997: 31(1), 1998: 32(1), 1999: 33(1), 2000: 34(1), 2001: 35(1), 2002: 36(1), 2003: 37(1), 2004: 38(1), 2005: 39(1), 2006: 40(1), 2007: 41(1), 2008: 42(1), 2009: 43(1), 2010: 44(1), 2011: 45(1-4), 2012: 46(1-4), 2013: 47(1-4), 2014: 48(1-4), 2015: 49(1-4), 2016: 50(1-4), 2017: 51(1-4), 2018: 52(1-4), 2019: 53(1-4), 2020: 54(1-4), 2021: 55(1-4), 2022: 56(1-4), 2023: 57(1-4), 2024: 58(1-4), 2025: 59(1-4), 2026: 60(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 : 4; 5 (2 to 4); 31 (1); 32; 33; 34; 35; 36; 37; 38; 39; 41; 42; 43; 44; 45 (2-3, 4); 46 (1, 2, 3-4); 47 (1, 2-3, 4); 48 (1-2, 3-4); 49 (1-2, 3-4); 51 (1 to 4); 52 (sup1, 1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (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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49 (1-2); 51 (2 to 4); 52 (sup1, 1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1)
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