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Portico
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Preserved
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2026-02-12
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Preserved : 1964/1965/1966: 1(1-7), 1966: 2(1-4), 1966/1967: 3(1-4), 1967: 4(1-4), 1967/1968: 5(1-4), 1968: 6(1-4), 1969: 7(1-4), 1969/1970: 8(1-4), 1970: 9(1-4), 1970: 10(1-4), 1970/1971: 11(1-4), 1971: 12(1-4), 1971: 13(1-4), 1971/1972: 14(1-4), 1972: 15(1-4), 1972: 16(1-4), 1972/1973: 17(1-4), 1973: 18(1-4), 1973: 19(1-4), 1973: 20(1-4), 1974: 21(1-4), 1974: 22(1-4), 1974: 23(1-4), 1974: 24(1-4), 1974: 25(1-4), 1975: 26(1-4), 1975: 27(1-4), 1975: 28(1-4), 1975: 29(1-4), 1975: 30(1-4)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 31 (1 to 3); 32 (, 1 to 3); 33 (, 1 to 3); 34 (, 1 to 3); 35 (, 1 to 3); 36 (, 1 to 3); 37 (, 1 to 3); 38 (, 1 to 3); 39 (, 1 to 3); 40 (, 1 to 3); 41 (, 1 to 3); 42 (, 1 to 3); 43 (, 1 to 3); 44 (, 1 to 3); 45 (, 1 to 3); 46 (, 1 to 3); 47 (, 1 to 3); 48 (, 1 to 3); 49 (, 1 to 3); 50 (, 1 to 3); 51 (, 1 to 3); 52 (, 1 to 3); 53 (, 1 to 3); 54 (, 1 to 3); 55 (, 1 to 3); 56 (, 1 to 3); 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, 2-3, 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 6); 85 (, 1 to 6); 86 (, 1 to 6); 87 (, 1 to 6); 88 (, 1 to 6); 89 (, 1 to 6); 90 (, 1-2, 3 to 6); 91 (, 1 to 6); 92 (, 1 to 6); 93 (, 1 to 6); 94 (, 1 to 6); 95 (, 1 to 6); 96 (, 1 to 6); 97 (, 1 to 6); 98 (, 1 to 6); 99 (, 1 to 6); 100 (, 1, 2, 3/4, 5/6); 101 (, 1 to 3); 102 (, 1 to 6); 103 (, 1 to 6); 104 (, 1 to 6); 105 (, 1-2, 3 to 6); 106 (, 1 to 6); 107 (, 1 to 6); 108 (, 1 to 6); 109 (, 1 to 6); 110 (, 1 to 6); 111 (, 1 to 3, 4-5, 6); 112 (, 1 to 4, 5-6); 113 (, 1 to 6); 114 (, 1 to 6); 115 (, 1 to 6); 116 (, 1-2, 3 to 6); 117 (, 1, 2-3, 4 to 6); 118 (, 1, 2, 3-4, 5, 6); 119 (, 1-2, 3 to 6); 120 (, 1 to 6); 121 (, 1, 2, 3-4, 5, 6); 122 (, 1 to 3, 5, 6); 123 (, 1 to 6); 124 (, 1 to 6); 125 (, 1 to 4, 5-6); 126 (, 1 to 6); 127 (, 1 to 6); 128 (, 1 to 6); 129 (, 1 to 6); 130 (, 1 to 6); 131 (, 1 to 12); 132 (, 1 to 12); 133 (, 1 to 12); 134 (, 1 to 10, 11-12); 135 (, 1 to 12); 136 (, 1 to 10, 11-12); 137 (, 1 to 5, 6-7, 8 to 10, 11-12); 138 (, 3, 6, 8-9, 10, 11-12); 139 (, 1 to 6, 8 to 12); 140 (, 1 to 12); 141 (, 1, 2, 3-4, 5 to 12); 142 (, 1 to 12); 143 (, 2 to 8, 9-10, 11, 12); 144 (, 1, 2, 4 to 7); 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 117
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 137
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 145
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Portico
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Preserved
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2026-02-12
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Preserved : 1975: 28(1-2), 1976: 31(1-3), 1976: 32(1-3), 1976: 33(1-3), 1976: 34(1-3), 1976/1977: 35(1-3), 1977: 36(1-3), 1977: 37(1-3), 1977: 38(1-3), 1977: 39(1-3), 1977/1978: 40(1-3), 1978: 41(1-3), 1978: 42(1-3), 1978: 43(1-3), 1978: 44(1-3), 1978: 45(1-3), 1979: 46(1-3), 1979: 47(1-3), 1979: 48(1-3), 1979: 49(1-3), 1979: 50(1-3), 1979: 51(1-3), 1979: 52(1-3), 1979/1980: 53(1-3), 1980: 54(1-3), 1980: 55(1-3), 1980/1981: 56(1-3), 1981: 57(1-4), 1981: 58(1-4), 1981: 59(1-4), 1982: 60(1-4), 1982: 61(1-4), 1982: 62(1-4), 1983: 63(1-4), 1983: 64(1-4), 1983/1984: 65(1-4), 1984: 66(1-4), 1984: 67(1-4), 1984: 68(1-4), 1985: 69(1-4), 1985/2004: 70(1-4), 1985: 71(1-4), 1986: 72(1-4), 1986: 73(1-4), 1986: 74(1-4), 1987: 75(1-4), 1987: 76(1-4), 1987: 77(1-4), 1988: 78(1-4), 1988: 79(1-4), 1988: 80(1-4), 1988/1989: 81(1-4), 1989: 82(1-4), 1989: 83(1-4), 1989/1990: 84(1-6), 1990: 85(1-6), 1990/1991: 86(1-6), 1991: 87(1-6), 1991/1992: 88(1-6), 1992: 89(1-6), 1992/1993: 90(1-6), 1993: 91(1-6), 1993: 92(1-6), 1994: 93(1-6), 1994: 94(1-6), 1995: 95(1-6), 1995: 96(1-6), 1996: 97(1-6), 1996: 98(1-6), 1996/1997: 99(1-6), 1997: 100(1-6), 1997: 101(1-3), 1998: 102(1-6), 1998: 103(1-6), 1999: 104(1-6), 1999: 105(1-6), 2000: 106(1-6), 2000: 107(1-6), 2001: 108(1-6), 2001: 109(1-6), 2002: 110(1-6), 2002: 111(1-6), 2003: 112(1-6), 2003: 113(1-6), 2003/2004: 114(1-6), 2004: 115(1-6), 2005: 116(1-6), 2005: 117(1-6), 2005/2006: 118(1-6), 2006: 119(1-6), 2006/2007: 120(1-6), 2007: 121(1-6), 2007/2008: 122(1-6), 2008: 123(1-6), 2008/2009: 124(1-6), 2009: 125(1-6), 2009: 126(1-6), 2010: 127(1-6), 2010: 128(1-6), 2011: 129(1-6), 2011: 130(1-6), 2012: 131(1-11), 2013: 132(1-12), 2014: 133(1-12), 2015: 134(1, 4-12), 2016: 135(1-12), 2017: 136(1-12), 2018: 137(1-12), 2019: 138(1-12), 2019/2020: 139(1-12), 2021: 140(1-12), 2022: 141(1-12), 2023: 142(2-12), 2024: 143(1-11), 2025: 144(1-12), 2026: 145(1)
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LOCKSS Archive
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In Progress
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2026-02-09
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138
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Library of Congress
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Preserved
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2025-04-07
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135 (5); 136 (2, 5, 7); 137 (2 to 6-7, 8 to 11-12); 138 (1 to 8-9, 10, 11-12); 139 (1 to 6-7, 8 to 12); 140 (1 to 12); 141 (1 to 3-4, 5 to 12); 142 (1 to 12); 143 (1 to 9-10)
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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 : 1 (2, 3, 5); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 9, 11, 12); 15 (1, 3 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 99 (2 to 6); 111 (1 to 4, 6); 112 (1 to 5); 113 (1 to 6); 114 (1 to 6); 115 (1 to 6); 116 (1, 3 to 6); 117 (1, 2, 4 to 6); 118 (1 to 3, 5, 6); 119 (1, 3 to 6); 121 (1 to 3, 5, 6); 122 (1 to 3, 5, 6); 123 (1 to 6); 124 (1 to 6); 125 (1 to 5); 126 (1 to 6); 127 (1 to 6); 128 (1 to 6); 129 (1 to 6); 131 (1 to 9, 11, 12); 132 (1 to 9, 11, 12); 133 (1 to 9, 11, 12); 134 (1 to 9, 11); 135 (1 to 9, 11, 12); 136 (1 to 9, 11); 137 (1 to 5, 6-7, 8, 9, 11-12); 138 (1 to 7, 8-9, 11-12); 139 (1 to 5, 6-7, 8, 9, 11, 12); 141 (1, 2, 3-4, 5 to 9, 11, 12); 142 (1 to 9, 11, 12); 143 (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 : 1 (2, 3, 5); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 9, 11, 12); 15 (1, 3 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 99 (2 to 6); 111 (1 to 4, 6); 112 (1 to 5); 113 (1 to 6); 114 (1 to 6); 115 (1 to 6); 116 (1, 3 to 6); 117 (1, 2, 4 to 6); 118 (1 to 3, 5, 6); 119 (1, 3 to 6); 121 (1 to 3, 5, 6); 122 (1 to 3, 5, 6); 123 (1 to 6); 124 (1 to 6); 125 (1 to 5); 126 (1 to 6); 127 (1 to 6); 128 (1 to 6); 129 (1 to 6); 131 (1 to 9, 11, 12); 132 (1 to 9, 11, 12); 133 (1 to 9, 11, 12); 134 (1 to 9, 11); 135 (1 to 9, 11, 12); 136 (1 to 9, 11); 137 (1 to 5, 6-7, 8, 9, 11-12); 138 (1 to 7, 8-9, 11-12); 139 (1 to 5, 6-7, 8, 9, 11, 12); 141 (1, 2, 3-4, 5 to 9, 11, 12); 142 (1 to 9, 11, 12); 143 (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 : 99 (2); 102 (6); 103 (3); 104 (6); 105 (1-2, 3-6); 106 (1-6); 107 (1-6); 108 (1-6); 109 (1-6); 110 (1-6); 111 (1-3, 4-5, 6); 112 (1-4, 5-6); 113 (1, 2, 6); 114 (3, 4); 115 (3); 116 (5, 6); 117 (4); 118 (2, 3-4, 5); 119 (1-2, 3, 6); 120 (1-6); 121 (1, 2, 3-4, 5, 6); 122 (1, 2, 3-4, 5, 6); 123 (1-6); 124 (1-6); 125 (1-4, 5-6); 126 (1-6); 127 (1-6); 128 (1-6); 129 (1-6); 130 (1-6); 131 (1-12); 132 (1-3, 5-12); 133 (1-12); 134 (1-10, 11-12); 135 (1-12); 136 (1-10, 11-12); 137 (1-5, 6-7, 8-10, 11-12); 138 (1-7, 8-9, 10)
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