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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 to 6); 2 (, 1 to 6); 3 (, 1 to 6); 4 (, 1 to 6); 5 (, 1 to 6); 6 (, 1 to 6); 7 (, 1 to 6); 8 (, 1 to 6); 9 (, 1 to 6); 10 (, 1 to 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 to 6); 49 (, 1 to 6); 50 (, 1 to 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 6); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1 to 7); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 6); 64 (, 1 to 6); 65 (, 1 to 6); 66 (, 1 to 6); 67 (, 1 to 6); 68 (, 1 to 6); 69 (, 1 to 6); 70 (, 1 to 6); 71 (, 1 to 6); 72 (, 1 to 6); 73 (, 1 to 6); 74 (, 1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (, 1 to 6); 78 (, 1 to 6); 79 (, 1 to 6); 80 (, 1 to 6); 81 (, 1 to 6); 82 (, 1 to 6); 83 (, 1 to 12); 84 (, 1 to 12); 85 (, 1 to 12); 86 (, 1 to 12); 87 (, 1 to 12); 88 (, 1 to 12); 89 (, 1 to 12); 90 (, 1 to 12); 91 (, 1 to 7); 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 66
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 92
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Portico
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Preserved
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2026-02-12
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Preserved : 1974: 1(1-6), 1975: 2(1-6), 1976: 3(1, S 1, 2, S 2, 3-6), 1977: 4(1, S 1, 2, S 2, 3, S 3, 4-6), 1978: 5(1, S 1, 2-6), 1978: 6(1-6), 1979: 7(1, S 1, 2, S 2, 3, S 3, 4-6), 1979: 8(1-2, S 2, 3-6), 1980: 9(1-6), 1980: 10(1, S 1, 2, S 2, 3-6), 1981: 11(1, S 1, 2-6), 1981: 12(1-6), 1982: 13(1, S 1, 2, S 2, 3-6), 1982: 14(1, S 1, 2, S 2, 3-6), 1983: 15(1, S 1, 2, S 2, 3, S 3, 4-6), 1983: 16(1, S 1, 2, S 2, 3-6), 1984: 17(1, S 1, 2-6), 1984: 18(1, S 1, 2, S 2, 3-6), 1985: 19(1, S 1, 2, S 2, 3-6), 1985: 20(1, S 1, 2, S 2, 3-6), 1986: 21(1, S 1, 2, S 2, 3-6), 1986: 22(1, S 1, 2, S 2, 3-6), 1987: 23(1, S 1, 2-6), 1987: 24(1, S 1, 2-6), 1988: 25(1, S 1, 2-6), 1988: 26(1-6), 1989: 27(1, S 1, 2, S 2, 3-6), 1989: 28(1, S 1, 2, S 2, 3-6), 1990: 29(1-6), 1990: 30(1, S 1, 2-6), 1991: 31(1-6), 1991: 32(1-6), 1992: 33(1-6), 1992: 34(1, S 1, 2-6), 1993: 35(1-6), 1993: 36(1-6), 1994: 37(1-6), 1994: 38(1-6), 1995: 39(1, S 1, 2-6), 1995: 40(1-6), 1996: 41(1-6), 1996: 42(1-6), 1997: 43(1-6), 1997: 44(1-6), 1998: 45(1-6), 1998: 46(1-6), 1999: 47(1-6), 1999: 48(1-6), 2000: 49(1-6), 2000: 50(1-6), 2001: 51(1-6), 2001: 52(1-6), 2002: 53(1-6), 2002: 54(1-6), 2003: 55(1-6), 2003: 56(1-6), 2004: 57(1-6), 2004: 58(1-6), 2005: 59(1-6), 2005: 60(1-6), 2006: 61(1-6), 2006: 62(1-6), 2007: 63(1-6), 2007: 64(1-6), 2008: 65(1-6), 2008: 66(1-6), 2009: 67(1-6), 2009: 68(1-6), 2010: 69(1-6), 2010: 70(1-6), 2011: 71(1-6), 2011: 72(1-6), 2012: 73(1-6), 2012: 74(1-6), 2013: 75(1, S1, 2-6), 2013: 76(1, S1, 2-6), 2014: 77(1-6), 2014: 78(1-6), 2015: 79(1-6), 2015: 80(1-6), 2016: 81(1-6), 2016: 82(1-6), 2017: 83(1-12), 2018: 84(1-12), 2019: 85(1-12), 2020: 86(1-12), 2021: 87(1-12), 2022: 88(1-12), 2023: 89(1-12), 2024: 90(1, S1, 2-12), 2025: 91(1, S1, 2-12), 2026: 92(1-2)
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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 to 6); 6 (1 to 6); 7 (, 1 to 6); 8 (1 to 6); 9 (S1, 1 to 3, 5 to 9, 11, 12); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (S1, 1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (S1, 1 to 6); 51 (1 to 6); 52 (S1, 1 to 6); 53 (, 1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (, 1 to 6); 57 (1 to 6); 58 (, 1 to 7); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (, 1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (, 1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (, 1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 9, 11, 12); 84 (1 to 9, 11, 12); 85 (1 to 9, 11, 12); 86 (1 to 9, 11, 12); 87 (1 to 9, 11, 12); 88 (1 to 9, 11, 12); 89 (1 to 9, 11, 12); 91 (S1, 1 to 9)
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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 6); 6 (1 to 6); 7 (, 1 to 6); 8 (1 to 6); 9 (S1, 1 to 3, 5 to 9, 11, 12); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (S1, 1 to 6); 47 (1 to 6); 48 (1 to 6); 49 (S1, 1 to 6); 51 (1 to 6); 52 (S1, 1 to 6); 53 (, 1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (, 1 to 6); 57 (1 to 6); 58 (, 1 to 7); 59 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (, 1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (, 1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (, 1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 9, 11, 12); 84 (1 to 9, 11, 12); 85 (1 to 9, 11, 12); 86 (1 to 9, 11, 12); 87 (1 to 9, 11, 12); 88 (1 to 9, 11, 12); 89 (1 to 9, 11, 12); 91 (S1, 1 to 9, 11)
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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 : 61 (1-6); 62 (1-6); 63 (1-6); 64 (1-6)
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Library of Congress
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Preserved
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2025-04-07
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2 (1); 8 (S2); 25 (5, S1); 31 (5); 40 (3); 41 (1, 5); 47 (4); 75 (1 to 6, S1); 76 (1 to 6, S1); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 80 (1 to 6); 81 (1 to 6); 82 (1 to 4); 83 (1 to 8, 10 to 12); 84 (1 to 3, 6, 7, 10, 12); 85 (1 to 6, 8, 10 to 12); 86 (1 to 7, 9 to 12); 87 (2 to 12); 88 (1 to 12); 89 (1, 7 to 11); 90 (4, 5)
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