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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 4); 2 (1, 3, 4); 3 (1 to 4); 4 (1 to 4); 5 (1, 3, 4); 6 (1 to 4); 7 (2 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 3); 11 (1, 3, 4); 12 (1 to 4); 13 (1, 3, 4); 14 (1, 3, 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 3); 29 (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, 4); 44 (1 to 6); 45 (1 to 6); 46 (1 to 3, 5 to 8); 47 (1 to 8); 48 (1 to 10); 49 (1 to 10); 50 (1 to 10); 51 (1 to 10)
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Internet Archive
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Preserved
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2025-08-08
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1 to 26
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Portico
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Preserved
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2026-04-02
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Preserved : 1971/1972: 1(1-4), 1972/1973: 2(1-4), 1973/1974: 3(1-4), 1974/1975: 4(1-4), 1975/1976: 5(1-4), 1976/1977: 6(1-4), 1977/1978: 7(1-4), 1978/1979: 8(1-4), 1979/1980: 9(1-4), 1980/1981: 10(1-4), 1981/1982: 11(1-4), 1982/1983: 12(1-4), 1983/1984: 13(1-4), 1984/1985: 14(1-4), 1985/1986: 15(1-4), 1986/1987: 16(1-4), 1987/1988: 17(1-4), 1988/1989: 18(1-4), 1989/1990: 19(1-4), 1990/1991: 20(1-4), 1991/1992: 21(1-4), 1992/1993: 22(1-4), 1993/1994: 23(1-4), 1994/1995: 24(1-4), 1995/1996: 25(1-4), 1996/1997: 26(1-4), 1997/1998: 27(1-4), 1998: 28(1-3)
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LOCKSS Archive
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Preserved
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2026-04-06
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30 to 53
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Portico
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Preserved
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2026-04-02
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Preserved : 2000: 29(3-4), 2000/2001: 30(1-4), 2001/2002: 31(1-4), 2002/2003: 32(1-4), 2003/2004: 33(1-4), 2004/2005: 34(1-4), 2005/2006: 35(1-4), 2006/2007: 36(1-4), 2007/2008: 37(1-4), 2008/2009: 38(1-4), 2009/2010: 39(1-4), 2010/2011: 40(1-4), 2011/2012: 41(1-4), 2012/2013: 42(1-4), 2013/2014: 43(1-4), 2014/2015: 44(1-6), 2015/2016: 45(1-6), 2016/2017: 46(1-8), 2017/2018: 47(1-8), 2018/2019: 48(1-10), 2019/2020: 49(1-10), 2020/2021: 50(1-10), 2021/2022: 51(1, 1, S, 2, 2, S, 3, 3, S, 4, 4, S, 5, 5, S, 6-10), 2022: 52, 2023: 53, 2024: 54, 2025: 55
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CLOCKSS Archive
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In Progress
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2026-04-06
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29 to 34, 46 to 56
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LOCKSS Archive
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In Progress
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2026-04-06
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29, 54 to 56
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CLOCKSS Archive
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Preserved
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2026-04-06
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35 to 45
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Library of Congress
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Preserved
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2025-04-07
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39 (3, 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 6); 45 (1 to 6); 46 (1 to 7); 47 (5, 8); 48 (1 to 4, 6, 8 to 10); 49 (1 to 10); 50 (1 to 10); 51 (5_suppl, 2_suppl, 3_suppl, 4_suppl, 1_suppl, 1 to 10); 52 (September 2022); 53 (May 2023); 54 (November 2024)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 52 (none); 53; 54
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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 : 1 (1-4); 2 (1, 3, 4); 3 (1, 2, 4); 4 (1-4); 5 (1, 3, 4); 6 (1-4); 7 (2-4); 8 (2-4); 9 (1-4); 10 (1-3); 11 (1, 3, 4); 12 (1-4); 13 (1, 3, 4); 14 (1, 3, 4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (2-4); 22 (2-4); 23 (1-4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-3); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1, 2, 4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-6); 45 (1, 2, 4-6); 46 (1-8); 47 (1-8); 48 (1-10); 49 (1-5)
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British Library
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Preserved
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2019-09-18
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Preserved : 43 (3 to 4), 44 (1 to 6), 45 (1 to 3; 5 to 6), 46 (1 to 8), 47 (1 to 8), 48 (1 to 5)
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