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Internet Archive
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Preserved
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2026-07-13
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1 to 51
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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 (3 to 6); 5 (1 to 4); 6 (1 to 4); 41 (1 to 6); 42 (1 to 6); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (sup1, 1 to 4); 52 (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 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4)
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Scholars Portal
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Preserved
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2026-06-02
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Preserved : 1 (1 to 6); 2 (1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1, 3 to 5); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 20 (1 to 6); 21 (1 to 6); 22 (sup1, 1 to 6); 23 (sup1, 1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1-2, 3 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4); 51 (sup1, 1 to 4); 52 (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 to 4); 60 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1)
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LOCKSS Archive
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In Progress
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2026-07-06
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LOCKSS Archive
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Preserved
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2026-07-06
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40 to 65
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CLOCKSS Archive
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Preserved
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2026-07-06
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46 to 48, 51 to 65
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LOCKSS Archive
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In Progress
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2026-07-06
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66
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Portico
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Preserved
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2026-07-09
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Preserved : 1960/1961: 1(1-6), 1962: 2(1-4), 1963: 3(1-4), 1964: 4(1-4), 1965: 5(1-4), 1966: 6(1-4), 1967: 7(1-4), 1968: 8(1-4), 1969: 9(1-4), 1970: 10(1-6), 1971: 11(1-6), 1972: 12(1-6), 1973: 13(1-6), 1974: 14(1, 3-5), 1975: 15(1-6), 1976: 16(1-6), 1977: 17(1-6), 1978: 18(1-6), 1979: 19(1-6), 1980: 20(1-6), 1981: 21(1-6), 1982: 22(1-6), 1983: 23(1-6), 1984: 24(1-6), 1985: 25(1-6), 1986: 26(1-6), 1987: 27(1-6), 1988: 28(1-6), 1989: 29(1-6), 1990: 30(1-6), 1991: 31(1-6), 1992: 32(1-6), 1993: 33(1-6), 1994: 34(1-6), 1995: 35(1-6), 1996: 36(1-6), 1997: 37(1-6), 1998: 38(1-6), 1999: 39(1-6), 2000: 40(1-6), 2001: 41(1-6), 2002: 42(1-6), 2003: 43(1-4), 2004: 44(1-4), 2005: 45(1-4), 2006: 46(1-4), 2007: 47(1-4), 2008: 48(1-4), 2009: 49(1-4), 2010: 50(1-4), 2011: 51(1-4), 2012: 52(1-4), 2013: 53(1-4), 2014: 54(1-4), 2015: 55(1-4), 2016: 56(1-4), 2017: 57(1-4), 2018: 58(1-4), 2019: 59(1-4), 2020: 60(1-4), 2021: 61(1-4), 2022: 62(1-4), 2023: 63(1-4), 2024: 64(1-4), 2025: 65(1-4), 2026: 66(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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50 (1 to 4); 51 (sup1, 1 to 4); 52 (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 to 4); 60 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 3); 64 (1 to 3)
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