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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 4); 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 4); 11 (, 1 to 4); 12 (, 1 to 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (, 1 to 4); 16 (, 1 to 4); 17 (, 1 to 4); 18 (, 1 to 4); 19 (, 1 to 7); 20 (, 1 to 7); 21 (, 1 to 7); 22 (, 1 to 7); 23 (, 1 to 8); 24 (, 1 to 8); 25 (, 1 to 4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1 to 4); 29 (, 1 to 4); 30 (, 1 to 4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (, 1 to 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 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 (, 1 to 4); 52 (, 1 to 4); 53 (, 1 to 4); 54 (, 1 to 4); 55 (, 1 to 4); 56 (, 1, 3, 4); 57 (, 1 to 4); 58 (, 1 to 4); 59 (, 1, 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 to 4); 67 (, 1 to 4); 68 (, 1 to 4); 69 (, 1 to 4); 70 (, 1 to 4); 71 (, 1 to 4); 72 (, 1 to 4); 73 (, 1 to 4); 74 (, 1 to 4); 75 (, 1 to 4); 76 (, 1 to 4); 77 (, 1 to 4); 78 (, 1 to 4); 79 (, 1 to 4); 80 (, 1 to 4); 81 (, 1 to 4); 82 (, 1 to 4); 83 (, 1 to 4); 84 (, 1 to 4); 85 (, 1 to 4); 86 (, 1); 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 44
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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 1(1-4), 1972: 2(1-4), 1973: 3(1-4), 1974: 4(1-4), 1975: 5(1-4), 1976: 6(1-4), 1977: 7(1-4), 1978: 8(1-4), 1979: 9(1-4), 1980: 10(1-4), 1981: 11(1-4), 1982: 12(1-4), 1983: 13(1-4), 1984: 14(1-4), 1985: 15(1-4), 1986: 16(1-4), 1987: 17(1-4), 1988: 18(1-4), 1989: 19(1-7), 1990: 20(1-7), 1991: 21(1-7), 1992: 22(1-7), 1993: 23(1-8), 1994: 24(1-8), 1995: 25(1-4), 1995: 26(1-4), 1996: 27(1-4), 1996: 28(1-4), 1997: 29(1-4), 1997: 30(1-4), 1998: 31(1-4), 1998: 32(1-4), 1999: 33(1-4), 1999: 34(1-4), 2000: 35(1-4), 2000: 36(1-4), 2001: 37(1-4), 2001: 38(1-4), 2002: 39(1-4), 2002: 40(1-4), 2003: 41(1-4), 2003: 42(1-4), 2004: 43(1-4), 2004: 44(1-4), 2005: 45(1-4), 2005: 46(1-4), 2006: 47(1-4), 2006: 48(1-4), 2007: 49(1-4), 2007: 50(1-4), 2008: 51(1-4), 2008: 52(1-4), 2009: 53(1-4), 2009: 54(1-4), 2010: 55(1-4), 2010: 56(1-4), 2011: 57(1-4), 2011: 58(1-4), 2012: 59(1-4), 2012: 60(1-4), 2013: 61(1-4), 2013: 62(1-4), 2014: 63(1-4), 2014: 64(1-4), 2015: 65(1-4), 2015: 66(1-4), 2016: 67(1-4), 2016: 68(1-4), 2017: 69(1-4), 2017: 70(1-4), 2018: 71(1-4), 2018: 72(1-4), 2019: 73(1-4), 2019: 74(1-4), 2020: 75(1-4), 2020: 76(1-4), 2021: 77(1-4), 2021: 78(1-4), 2022: 79(1-4), 2022: 80(1-4), 2023: 81(1-4), 2023: 82(1-4), 2024: 83(1-4), 2024: 84(1-4), 2025: 85(1-4), 2025: 86(1-4), 2026: 87(1-2)
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CLOCKSS Archive
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Preserved
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2026-02-09
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5, 21 to 87
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.29:1-4;vol.30:1-4;vol.31:1-4;vol.32:1-4;vol.33:1-4;vol.34:1-4;vol.35:1-4;vol.36:1-4;vol.37:1-4;vol.38:1-4;vol.39:1-4;vol.40:1-4;vol.41:1-4;vol.42:1-4;vol.43:1-4;vol.44:1-4;vol.45:1-4;vol.46:1-4;vol.47:1-4;vol.48:1-4;vol.49:1-4;vol.50:1-4;vol.51:1-4;vol.52:1-4;vol.53:1-4;vol.54:1-4;vol.55:1-4;vol.56:1-4;vol.57:1-4;vol.58:1-4;vol.59:1-4;vol.60:1-4;vol.61:1-4;vol.62:1-4;vol.63:1-4;vol.64:1-4;vol.65:1-4;vol.66:1-4;vol.67:1-4;vol.68:1-4;vol.69:1-4;vol.70:1-4;vol.71:1-4;vol.72:1-4;vol.73:1-4;vol.74:1-4;vol.75:1-4;vol.76:1-4;vol.77:1
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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 : 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 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 (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); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 3)
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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 : 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 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 (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); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 3)
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