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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 3 (1 to 4); 4 (, 1 to 4); 5 (, 1 to 4); 6 (, 1 to 4); 7 (, 1 to 6); 8 (, 1, 2, 3-4, 5, 6); 9 (, 1, 2-3, 4, 5-6); 10 (, 1, 2, 3-4, 5, 6); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1 to 6); 14 (, 1 to 6); 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 (, 1 to 6); 23 (, 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 to 6); 41 (, 1 to 6); 42 (, 1 to 6); 43 (, 1 to 6); 44 (, 1 to 6); 45 (, 1 to 6); 46 (, 1 to 6); 47 (, 1 to 6); 48 (, 1, 2, 3-4, 5, 6); 49 (, 1-2, 3 to 6); 50 (, 1/2, 3 to 6); 51 (, 1, 2, 3/4, 5, 6); 52 (, 1 to 6); 53 (, 1, 2, 3/4, 5, 6); 54 (, 1 to 8, 9/10, 11, 12); 55 (, 1 to 10, 11/12); 56 (, 1 to 5, 6/7, 8, 9-10, 11, 12); 57 (, 1 to 6, 8 to 12); 58 (, 1 to 12); 59 (, 1 to 4, 5-6, 7, 8-9, 10 to 12); 60 (, 1 to 12); 61 (, 1 to 4, 5-6, 7 to 12); 62 (, 1 to 13); 63 (, 1 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 12); 71 (, 1 to 12); 72 (, 1 to 12); 73 (, 1 to 12); 74 (, 1 to 12); 75 (, 1, 3, 8 to 12); 76 (, 1 to 12); 77 (, 1 to 12); 78 (, 1 to 12); 79 (, 1 to 12); 80 (, 1 to 3, 5 to 12); 81 (, 1 to 7); 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 59
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 35, 37 to 50, 52 to 74
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 82
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Portico
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Preserved
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2026-02-12
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Preserved : 1970/1971: 3(1-4), 1971/1972: 4(1-4), 1972/1973: 5(1-4), 1973: 6(1-4), 1974: 7(1-6), 1975: 8(1-6), 1975/1976: 9(1-6), 1976: 10(1-6), 1977: 11(1-6), 1977: 12(1-6), 1978: 13(1-6), 1978: 14(1-6), 1979: 15(1-6), 1979: 16(1-6), 1980: 17(1-6), 1980: 18(1-6), 1981: 19(1-6), 1981: 20(1-6), 1981/1982: 21(1-6), 1982: 22(1-6), 1982: 23(1-6), 1983: 24(1-6), 1983: 25(1-6), 1984: 26(1-6), 1984/1985: 27(1-6), 1985: 28(1-6), 1985/1986: 29(1-6), 1986: 30(1-6), 1986/1987: 31(1-6), 1987: 32(1-6), 1987/1988: 33(1-6), 1988: 34(1-6), 1988: 35(1-6), 1989: 36(1, S 1, 2-6), 1989: 37(1-6), 1990: 38(1-6), 1990: 39(1-6), 1991: 40(1-6), 1991: 41(1-6), 1992: 42(1-6), 1992: 43(1-6), 1993: 44(1-6), 1993: 45(1-6), 1994: 46(1-6), 1994/1995: 47(1-6), 1995: 48(1-6), 1995/1996: 49(1-6), 1996: 50(1-6), 1996/1997: 51(1-6), 1997: 52(1-6), 1997/1998: 53(1-6), 1998/1999: 54(1-12), 1999/2000: 55(1-12), 2000/2001: 56(1-12), 2001/2002: 57(1-12), 2002/2003: 58(1-12), 2003/2004: 59(1-12), 2004/2005: 60(1-12), 2005: 61(1-12), 2006: 62(1-12), 2007: 63(1-12), 2008: 64(1-12), 2009: 65(1-12), 2010: 66(1-12), 2011: 67(1-12), 2012: 68(1-9), 2013: 69(1, S 1, 2-12), 2014: 70(1-10, 12), 2015: 71(1-12), 2016: 72(1-12), 2017: 73(1-12), 2018: 74(1-12), 2019: 75(1, S 1, 2-12), 2019/2020: 76(1-12), 2021: 77(1, S 1, 2-12), 2022: 78(1, S 1, 2-12), 2023: 79(2-12), 2024: 80(1-12), 2025: 81(1, S 1, 2-3, 5-9, 11-12), 2026: 82(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
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Portico
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Preserved
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2026-02-12
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Preserved : 1968/1969: 1(1-4), 1969/1970: 2(1-4)
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Library of Congress
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Preserved
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2025-04-07
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74 (1 to 12); 75 (1, S1, 2 to 12); 76 (1 to 12); 77 (S1, 1 to 12); 78 (1, S1, 2 to 12); 79 (1 to 12); 80 (1 to 11)
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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 : 6 (1 to 9, 11, 12); 7 (1 to 9, 11, 12); 8 (1 to 9, 11, 12); 51 (5, 6); 52 (1 to 6); 53 (1 to 3, 5, 6); 54 (1 to 9, 11, 12); 55 (1 to 9, 11); 56 (1 to 6, 8, 9, 11, 12); 57 (1 to 6, 8, 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 5, 7, 8, 11, 12); 61 (1 to 5, 7 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 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 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (Suppl 1, 1 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (Suppl 1, 1 to 9, 11, 12); 78 (Suppl 1, 1 to 9, 11, 12); 79 (1 to 9, 11, 12)
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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 : 6 (1 to 9, 11, 12); 7 (1 to 9, 11, 12); 8 (1 to 9, 11, 12); 51 (5, 6); 52 (1 to 6); 53 (1 to 3, 5, 6); 54 (1 to 9, 11, 12); 55 (1 to 9, 11); 56 (1 to 6, 8, 9, 11, 12); 57 (1 to 6, 8, 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 5, 7, 8, 11, 12); 61 (1 to 5, 7 to 9, 11, 12); 62 (1 to 9, 11, 12); 63 (1 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 to 9, 11, 12); 69 (1 to 9, 11, 12); 71 (1 to 9, 11, 12); 72 (1 to 9, 11, 12); 73 (1 to 9, 11, 12); 74 (1 to 9, 11, 12); 75 (Suppl 1, 1 to 9, 11, 12); 76 (1 to 9, 11, 12); 77 (Suppl 1, 1 to 9, 11, 12); 78 (Suppl 1, 1 to 9, 11, 12); 79 (1 to 9, 11, 12)
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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 : 26 (2); 50 (1-2, 3-6); 51 (1, 2, 3-4, 5, 6); 52 (1-6); 53 (1, 2, 3-4, 5, 6); 54 (1-8, 9-10, 11, 12); 55 (1-10, 11-12); 56 (1-5, 6-7, 8, 9-10, 11, 12); 57 (1-5, 6-7, 8-12); 58 (1-12); 59 (1-4, 5-6, 7, 8-9, 10-12); 60 (1-12); 61 (1-4, 5-6, 7-12); 62 (1-9, 11-13); 63 (1-12); 64 (1-12); 65 (1-12); 66 (1-12); 67 (supplement-1, 1-12); 68 (1-12); 69 (supplement-1, 1-12); 70 (1-12); 71 (1-12); 72 (1-12); 73 (1-12); 74 (1-12); 75 (supplement-1, 1-11)
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