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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 2 (, 1 to 12); 3 (, 1 to 12); 4 (, 1 to 12); 5 (, 1, 2-3, 4 to 12); 6 (, 1 to 7, 8-9, 10 to 12); 7 (, 1 to 12); 8 (, 1 to 12); 9 (, 1 to 12); 10 (, 1 to 12); 11 (, 1 to 12); 12 (, 1 to 12); 13 (, 1 to 12); 14 (, 1 to 12); 15 (, 1 to 12); 16 (, 1); 17 (, 1 to 12); 18 (, 1 to 12); 19 (, 1); 20 (, 1 to 12); 21 (, 1 to 12); 22 (, 1-6, 7-12); 23 (, 1 to 12); 24 (, 1); 25 (, 1 to 12); 26 (, 1); 27 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 28 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 29 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 30 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 31 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 32 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 33 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 34 (, 1-2, 3-4, 5-8, 9-10, 11-12); 35 (, 1-2, 3-4, 5-6, 7-8, 9-12); 36 (, 1); 37 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 38 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 39 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 40 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 41 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 42 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 43 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 44 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 45 (, 1); 46 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 47 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 48 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 49 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 50 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 51 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 52 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 53 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 54 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 55 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 56 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 57 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 58 (, 1-2, 3, 5-6, 7-8, 9-10, 11-12); 59 (, 1, 2, 3-4, 5-6, 7-8, 9-10, 11-12); 60 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 61 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 62 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13); 63 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13); 64 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 65 (, 1-2, 3-4, 5-6, 7, 9-10, 11-12); 66 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 67 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 68 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 69 (, 1 to 3, 5, 7-8, 9-10, 11-12); 70 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 71 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 72 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 73 (, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 74 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 75 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 76 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 77 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 78 (, 1-2, 3-4, 5, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 79 (, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 80 (, 1 to 12); 81 (, 1 to 12); 82 (, 1 to 12); 83 (, 1 to 12); 84 (, 1 to 12); 85 (, 1 to 9, 10-11, 12); 86 (, 1 to 7, 8-9, 10, 11-12); 87 (, 2 to 6, 7-8, 9, 10, 11-12); 88 (, 1 to 6); 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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1 to 62
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Portico
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Preserved
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2026-02-12
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Preserved : 1968: 1(1-12), 1969: 2(1-12), 1970: 3(1-12), 1971: 4(1-12), 1972: 5(1-12), 1973: 6(1-12), 1974: 7(1-12), 1975: 8(1-12), 1976: 9(1-12), 1977: 10(1-12), 1978: 11(1-12), 1979: 12(1-12), 1980: 13(1-12), 1981: 14(1-12), 1982: 15(1-12), 1982: 16(1), 1983: 17(1-12), 1984: 18(1-12), 1984: 19(1)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 89
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Portico
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Preserved
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2026-02-12
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Preserved : 1985: 20(1-12), 1986: 21(1-12), 1986: 22(1-12), 1987: 23(1-12), 1987: 24(1), 1988: 25(1-12), 1988: 26(1), 1989: 27(1-12), 1989: 28(1-12), 1990: 29(1-12), 1990: 30(1-12), 1991: 31(1-12), 1991: 32(1-12), 1992: 33(1-12), 1992: 34(1-12), 1993: 35(1-12), 1993: 36(1), 1993: 37(1-12), 1994: 38(1-12), 1994: 39(1-12), 1995: 40(1-12), 1995: 41(1-12), 1996: 42(1-12), 1996: 43(1-12), 1997: 44(1-12), 1997: 45(1), 1997: 46(1-12), 1998: 47(1-12), 1998: 48(1-12), 1999: 49(1-12), 1999: 50(1-12), 2000: 51(1-12), 2000: 52(1-12), 2000/2001: 53(1-12), 2001: 54(1-12), 2002: 55(1-12), 2002: 56(1-12), 2003: 57(1-12), 2003: 58(1-12), 2004: 59(1-12), 2004: 60(1-12), 2005: 61(1-12), 2005: 62(1-13), 2006: 63(1-13), 2006: 64(1-12), 2007: 65(1-12), 2007: 66(1-12), 2008: 67(1-12), 2008: 68(1-12), 2008/2009: 69(1-12), 2009: 70(1-12), 2010: 71(1-12), 2010: 72(1-12), 2011: 73(1-12), 2011: 74(1-12), 2012: 75(1-24), 2013: 76(1-24), 2014: 77(1-24), 2015: 78(5-24), 2016: 79(1-24), 2017: 80(1-12), 2018: 81(1-12), 2018/2019: 82(1-12), 2019/2020: 83(1-12), 2021: 84(1-12), 2022: 85(1-12), 2023: 86(1-12), 2024: 87(1-10), 2025: 88(1, 4-6, 8-12), 2026: 89(1-2)
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LOCKSS Archive
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In Progress
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2026-02-09
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75, 82
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LOCKSS Archive
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Preserved
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2026-02-09
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76 to 81
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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 : 44 (5-6); 50 (9-10); 52 (3-4, 5-6, 9-10); 53 (1-2); 54 (9-10); 55 (supplement-1, 1-2, 5-6, 11-12); 57 (1-2); 58 (3-4, 5-6, 7-8, 9-10, 11-12); 59 (1, 2, 3-4, 5-6, 7-8, 9-10, 11-12); 60 (1, 3-4, 5-6, 7-8, 9-10, 11-12); 61 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 62 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13); 63 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13); 64 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 65 (1-2, 3-4, 5-6, 9-10, 11-12); 66 (supplement-1, 1, 3-4, 5-6, 7-8, 9-10, 11-12); 67 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 68 (1, 3-4, 5-6, 7-8, 9-10, 11-12); 69 (supplement-1, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 70 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 71 (supplement-1, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 72 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 73 (supplement-1, 1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 74 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12); 75 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 76 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 77 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 78 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 79 (1-2, 3-4, 5-6, 7-8, 9-10, 11-12, 13-14, 15-16, 17-18, 19-20, 21-22, 23-24); 80 (1-12); 81 (1-12); 82 (1-12)
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Library of Congress
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Preserved
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2025-04-07
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79 (17-18); 81 (1 to 12); 82 (1 to 12); 83 (1 to 12); 84 (1 to 12); 85 (1 to 10-11, 12); 86 (1 to 8-9, 10, 11-12); 87 (1 to 7-8, 10)
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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 (1, 3, 5, 7, 9, 11); 6 (1, 3, 5, 7, 9, 11); 7 (1, 3, 5, 7, 9, 11); 8 (1 to 9, 11, 12); 44 (1, 3, 5, 7, 9, 11); 45 (1); 46 (3, 5, 7, 9, 11); 47 (1, 3, 5, 7, 9, 11); 48 (1, 3, 5, 7, 9, 11); 49 (1, 3, 5, 7, 9, 11); 51 (1, 3, 5, 7, 9, 11); 52 (1, 3, 5, 7, 9, 11); 53 (1, 3, 5, 7, 9, 11); 54 (1, 3, 5, 7, 9, 11); 55 (1, 3, 5, 7, 9, 11); 56 (1, 3, 5, 7, 9, 11); 57 (1, 3, 5, 7, 9, 11); 58 (1, 3, 5, 7, 9, 11); 59 (1 to 3, 5, 7, 9, 11); 61 (1, 3, 5, 7, 9, 11); 62 (1, 3, 5, 7, 9, 11, 13); 63 (1, 3, 5, 7, 9, 11, 13); 64 (1, 3, 5, 7, 9, 11); 65 (1, 3, 5, 7, 9, 11); 66 (1, 3, 5, 7, 9, 11); 67 (1, 3, 5, 7, 9, 11); 68 (1, 3, 5, 7, 9, 11); 69 (1 to 3, 5, 7, 9, 11); 71 (1, 3, 5, 7, 9, 11); 72 (1, 3, 5, 7, 9, 11); 73 (1, 3, 5, 7, 9, 11); 74 (1, 3, 5, 7, 9, 11); 75 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 76 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 77 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 78 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 79 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 81 (1 to 9, 11, 12); 82 (1 to 9, 11, 12); 83 (1 to 9, 11, 12); 84 (1 to 9, 11, 12); 85 (1-11, 2 to 9, 12); 86 (1 to 7, 8-9, 11-12); 87 (1 to 7, 9, 11)
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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, 3, 5, 7, 9, 11); 6 (1, 3, 5, 7, 9, 11); 7 (1, 3, 5, 7, 9, 11); 8 (1 to 9, 11, 12); 44 (1, 3, 5, 7, 9, 11); 45 (1); 46 (3, 5, 7, 9, 11); 47 (1, 3, 5, 7, 9, 11); 48 (1, 3, 5, 7, 9, 11); 49 (1, 3, 5, 7, 9, 11); 51 (1, 3, 5, 7, 9, 11); 52 (1, 3, 5, 7, 9, 11); 53 (1, 3, 5, 7, 9, 11); 54 (1, 3, 5, 7, 9, 11); 55 (1, 3, 5, 7, 9, 11); 56 (1, 3, 5, 7, 9, 11); 57 (1, 3, 5, 7, 9, 11); 58 (1, 3, 5, 7, 9, 11); 59 (1 to 3, 5, 7, 9, 11); 61 (1, 3, 5, 7, 9, 11); 62 (1, 3, 5, 7, 9, 11, 13); 63 (1, 3, 5, 7, 9, 11, 13); 64 (1, 3, 5, 7, 9, 11); 65 (1, 3, 5, 7, 9, 11); 66 (1, 3, 5, 7, 9, 11); 67 (1, 3, 5, 7, 9, 11); 68 (1, 3, 5, 7, 9, 11); 69 (1 to 3, 5, 7, 9, 11); 71 (1, 3, 5, 7, 9, 11); 72 (1, 3, 5, 7, 9, 11); 73 (1, 3, 5, 7, 9, 11); 74 (1, 3, 5, 7, 9, 11); 75 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 76 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 77 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 78 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 79 (1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); 81 (1 to 9, 11, 12); 82 (1 to 9, 11, 12); 83 (1 to 9, 11, 12); 84 (1 to 9, 11, 12); 85 (1-11, 2 to 9, 12); 86 (1 to 7, 8-9, 11-12); 87 (1 to 7, 9, 11)
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