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Portico
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Preserved
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2026-04-02
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Preserved : 1957: 1(1-4), 1958: 2(1-4), 1959: 3(1-4), 1960: 4(1-4), 1961: 5(1-4), 1962: 6(1-4), 1963: 7(1-4), 1964: 8(1-4), 1965: 9(1-4), 1966: 10(1-4), 1967: 11(1-4), 1968: 12(1-4), 1969: 13(1-4), 1970: 14(1-5), 1971: 15(1-6), 1972: 16(1-6), 1973: 17(1-6), 1974: 18(1-6), 1975: 19(1-6), 1976: 20(1-6)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1 to 70
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Internet Archive
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Preserved
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2025-08-08
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14 to 42
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 21 (1 to 12); 22 (1 to 12); 23 (1 to 12); 24 (1 to 12); 25 (1 to 12); 26 (1 to 12); 27 (1 to 12); 28 (1 to 12); 29 (1 to 12); 30 (1 to 12); 31 (1 to 12); 32 (1 to 12); 33 (1 to 12); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (1 to 12); 38 (1 to 12); 39 (1 to 12); 40 (1 to 12); 41 (1 to 12); 42 (1 to 12); 43 (1 to 12); 44 (1 to 12); 45 (1 to 12); 46 (1 to 12); 47 (1 to 12); 48 (1 to 12); 49 (1 to 12); 50 (1 to 12); 51 (1 to 12); 52 (9); 56 (5 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 12); 60 (1 to 12); 61 (1, 2, 3-4, 5 to 12); 62 (1 to 12); 63 (1, 2, 3-4, 5, 6, 8 to 12); 64 (1 to 12); 65 (1 to 12); 66 (1 to 12); 67 (1 to 12); 68 (1 to 12); 69 (1 to 12); 70 (1 to 3)
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Portico
|
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Preserved
|
2026-04-02
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Preserved : 2009/2011: 21(1-12), 2009: 22(1-12), 2009: 23(1-12), 2009: 24(1-12), 2008: 28(1-12), 2008: 29(1-12), 2008: 30(1-12), 2008: 31(1-12), 2008: 32(1-12), 2008: 33(1-12), 2008: 34(1-12), 2008: 35(1-12), 2008/2011: 36(1-12), 2008: 37(1-12), 2008: 38(1-12), 2008: 39(1-12), 2008: 40(1-12), 2008: 41(1-12), 2008: 42(1-12), 2008: 43(1-12), 2008: 44(1-12)
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Portico
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Preserved
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2026-04-02
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Preserved : 1977: 21(1-12), 1978: 22(1-12), 1979: 23(1-12), 1980: 24(1-12), 1981: 25(1-12), 1982: 26(1-12), 1983: 27(1-12), 1984: 28(1-12), 1985: 29(1-12), 1986: 30(1-12), 1987: 31(1-12), 1988: 32(1-12), 1989: 33(1-12), 1990: 34(1-12), 1991: 35(1-12), 1992: 36(1-12), 1993: 37(1-12), 1994: 38(1-12), 1995: 39(1-12), 1996: 40(1-12), 1997: 41(1-12), 1998: 42(1-12), 1999: 43(1-12), 2000: 44(1-12), 2001: 45(1-12), 2002: 46(1-12), 2003: 47(1-12), 2004: 48(1-12), 2005: 49(1-12), 2006: 50(1-12), 2007: 51(1-12), 2008: 52(1-12), 2009: 53(1-12), 2010: 54(1-12), 2011: 55(1-12), 2012: 56(1-12), 2013: 57(1-12), 2014: 58(1-12), 2015: 59(1-12), 2016: 60(1-12), 2017: 61(1-12), 2018: 62(1-12), 2019: 63(1-12), 2020: 64(1-12), 2021: 65(1-12), 2022: 66(1-12), 2023: 67(1-12), 2024: 68(1-12), 2025: 69(1-12), 2026: 70(1-2)
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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 (1 to 9, 11, 12); 6 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1, 2, 3-4, 5 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1, 2, 3-4, 5 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1, 3 to 5, 7 to 9, 11, 12); 69 (1 to 9)
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National Digital Preservation Program, China
|
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Preserved
|
2025-10-23
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Preserved : 5 (1 to 9, 11, 12); 6 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 9, 11, 12); 45 (1 to 9, 11, 12); 46 (1 to 9, 11, 12); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 9, 11, 12); 53 (1 to 9, 11, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1, 2, 3-4, 5 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1, 2, 3-4, 5 to 9, 11, 12); 64 (1 to 9, 11, 12); 65 (1 to 9, 11, 12); 66 (1 to 9, 11, 12); 67 (1 to 9, 11, 12); 68 (1, 3 to 5, 7 to 9, 11, 12); 69 (2 to 9)
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