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Scholars Portal
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Preserved
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2026-03-19
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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 4)
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Internet Archive
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Preserved
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2025-08-08
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1 to 40
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LOCKSS Archive
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In Progress
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2026-04-13
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Portico
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Preserved
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2026-04-16
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Preserved : 1969/1970/1971: 1(1-6), 1971/1972: 2(1-6), 1971/1972: 3(1-6), 1972/1973: 4(1-6), 1973/1974: 5(1-6), 1974/1975: 6(1-6), 1975/1976: 7(1-6), 1976/1977: 8(1-6), 1977/1978: 9(1-6), 1978/1979: 10(1-6), 1979/1980: 11(1-6), 1980/1981: 12(1-6), 1981/1982: 13(1-6), 1982/1983: 14(1-6), 1983/1984: 15(1-6), 1984/1985: 16(1-6), 1985/1986: 17(1-6), 1986/1987: 18(1-6), 1987/1988: 19(1-6), 1988/1989: 20(1-6), 1989/1990: 21(1-6), 1990/1991: 22(1-6), 1991/1992: 23(1-6), 1992/1993: 24(1-6), 1993/1994: 25(1-6), 1994/1995: 26(1-6), 1995/1996: 27(1-6), 1996: 28(1-6), 1997: 29(4-5), 1998: 30(1, 3, 5-6), 1999: 31(1, 4, 6), 2000: 32(5)
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 57
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Portico
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Preserved
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2026-04-16
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Preserved : 2006: 38(5)
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Portico
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Preserved
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2026-04-16
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Preserved : 2012: 43(6), 2012/2013: 44(3-6), 2013/2014: 45(1-6), 2014/2015: 46(1, 3, 5-6), 2015/2016: 47(1-6), 2016/2017: 48(1-6), 2017/2018: 49(1-6), 2018/2019: 50(1-6), 2019/2020: 51(1-6), 2020/2021: 52(1-6), 2021/2022: 53(1-6), 2022/2023: 54(1-6), 2023/2024: 55(1-6), 2024/2025: 56(1, 3, 5-6), 2025: 57(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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49 (1, 2, 4 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)
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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 (2 to 6); 4 (1 to 6); 5 (1 to 6); 29 (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); 41 (1 to 5); 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); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (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 (2 to 6); 4 (1 to 6); 5 (1 to 6); 29 (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); 41 (1 to 5); 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); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 3)
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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 : 41 (5, 6); 42 (1 to 6)
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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 : 41 (5, 6); 42 (1 to 6)
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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 : 29 (5); 30 (3, 5); 32 (4-6); 33 (1-6); 34 (1-6); 35 (1-6); 36 (1-6); 37 (1-6); 38 (1-6); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-6); 44 (1-6); 45 (1-6); 46 (1-6); 47 (1-6); 48 (1-6); 49 (1-6); 50 (1-6); 51 (1, 2); 90 (5)
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