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Portico
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Preserved
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2026-02-12
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Preserved : 1960: 1(1), 1961: 2(1), 1962: 3(1), 1963: 4(1), 1964: 5(1), 1965: 6(1), 1966: 7(1), 1967: 8(1-4), 1968: 9(1-4), 1969: 10(1-4), 1970: 11(1-4), 1971: 12(2-4), 1972: 13(2-4), 1973: 14(1-3, 5), 1974: 15(1-4), 1975: 16(1-4), 1976: 17(1-4), 1977: 18(1-4), 1978: 19(1-4), 1979: 20(1-4), 1980: 21(1-4), 1981: 22(1-4), 1982: 23(1-4), 1983: 24(1-4), 1984: 25(1-4), 1985: 26(1-4), 1986: 27(1-4), 1987: 28(1-4), 1988: 29(1-4), 1989: 30(1-4), 1990: 31(1-4), 1991: 32(1-4), 1992: 33(1-4), 1993: 34(1-4), 1994: 35(1-4), 1995: 36(1-4), 1996: 37(1-4), 1997: 38(1-4), 1998: 39(1-4), 1999: 40(1-4), 2000: 41(1-4), 2001: 42(1, S 1, 2-4), 2002: 43(1, S 1, S 1, Proceedings, 2-4), 2003: 44(1, S 1, S 1, Proceedings, 2-4), 2004: 45(1, S 1, S 1, Proceedings, 2-4), 2005: 46(1-4), 2006: 47(1), 2006: 48(1, S 1), 2007: 49(1, S 1), 2008: 50(1, S 1), 2009: 51(1), 2010: 52(1, S 1), 2011: 53(1, S 1), 2012: 54(1, S 1), 2013: 55(1), 2014: 56(1), 2015: 57(1), 2016: 58(1-2), 2017: 59(1), 2018: 60(1), 2019: 61(1, S 1), 2020: 62(1), 2021: 63(1), 2022: 64(1), 2023: 65(1, S 1), 2024: 66(1), 2025: 67(1), 2026: 68(1)
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CLOCKSS Archive
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Preserved
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2026-02-09
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42 to 68
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Scholars Portal
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Preserved
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2025-09-02
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Preserved :
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LOCKSS Archive
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Preserved
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2026-02-09
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42 to 54
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CLOCKSS Archive
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Preserved
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2026-02-09
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50 to 56
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LOCKSS Archive
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Preserved
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2026-02-09
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55 to 60
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LOCKSS Archive
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In Progress
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2026-02-09
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61
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 52 (Suppl 1, 1); 53 (Suppl 1, 1); 54 (Suppl 1, 1); 55; 56; 57 (Suppl 1, 1); 58 (Suppl 1, 1); 59; 61 (Suppl 1, 1); 62; 63; 64; 65 (Suppl 1, 1); 66; 67
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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 : 52 (Suppl 1, 1); 53 (Suppl 1, 1); 54 (Suppl 1, 1); 55; 56; 57 (Suppl 1, 1); 58 (Suppl 1, 1); 59; 61 (Suppl 1, 1); 62; 63; 64; 65 (Suppl 1, 1); 66; 67
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 5 (Suppl 1, 1); 6; 42 (Suppl 1, 1 to 4); 43 (Suppl 1, 1 to 4); 44 (Suppl 1, 1 to 4); 45 (Suppl 1, 1 to 4); 46 (1 to 4); 47 (1); 48 (Suppl 1, 1); 49 (Suppl 1, 1); 51; 52; 53; 54; 55; 56; 57; 58 (2); 59 (1); 61; 62; 63; 64; 65 (Suppl 1, 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 : 5 (Suppl 1, 1); 6; 42 (Suppl 1, 1 to 4); 43 (Suppl 1, 1 to 4); 44 (Suppl 1, 1 to 4); 45 (Suppl 1, 1 to 4); 46 (1 to 4); 47 (1); 48 (Suppl 1, 1); 49 (Suppl 1, 1); 51; 52; 53; 54; 55; 56; 57; 58 (2); 59 (1); 61; 62; 63; 64; 65 (Suppl 1, 1)
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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; 8; 42 (2-4); 43 (1-4); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1); 48; 49; 50; 51; 52; 53; 54; 55; 56
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British Library
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Preserved
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2019-09-18
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Preserved : 42 (1 to 4; Supp 1), 43 (1 to 4; Supp 1), 44 (1 to 4; Supp 1), 45 (1 to 4; Supp 1), 46 (1 to 4), 47 (1), 48 (1; Supp 1), 49 (1; Supp 1), 50 (1; Supp 1), 51 (1), 52 (1; Supp 1), 53 (1; Supp 1), 54 (1; Supp 1), 55 (1), 56 (1)
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