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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 8); 2 (1 to 6); 3 (1 to 6); 4 (1 to 4); 5 (1-2, 3, 4); 6 (1 to 4); 7 (1-3, 4); 8 (1 to 4); 9 (1-2, 3, 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1, 2-3, 4); 15 (1, 2, 3-4); 16 (1 to 4); 17 (1 to 3); 18 (1 to 3); 19 (1 to 3); 20 (1 to 3); 21 (1 to 3); 22 (1, 2-3); 23 (1, 2, 3/4); 24 (1-2, 3, 4); 25 (1 to 4); 26 (1-2, 3, 4); 27 (1 to 4); 28 (1 to 4); 29 (1-2, 3, 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 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 12); 40 (1 to 12); 41 (1 to 12); 42 (1 to 12); 43 (1 to 12); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 12); 48 (1 to 12); 49 (1 to 12); 50 (Suppl, 1 to 12); 51 (1); 52; 53
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Internet Archive
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Preserved
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2025-08-08
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14 to 20
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 53
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Portico
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Preserved
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2026-04-16
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Preserved : 1973/1974: 1(1-8), 1975/1976: 2(1-6), 1976/1977: 3(1-6), 1978/1979: 4(1-4), 1979: 5(1-4), 1980: 6(1-4), 1981: 7(1-4), 1981/1982: 8(1-4), 1983/1984: 9(1-4), 1984/1985: 10(1-4), 1986: 11(1-4), 1987: 12(1-4), 1988: 13(1-4), 1990: 14(1-4), 1991: 15(1-4), 1992: 16(1-4), 1993: 17(1-3), 1993: 18(1-3), 1994: 19(1-3), 1994: 20(1-3), 1995: 21(1-3), 1995: 22(1-3), 1996: 23(1-4), 1997: 24(1-4), 1998: 25(1-4), 1999: 26(1-4), 2000: 27(1-4), 2001: 28(1-4), 2002: 29(1-4), 2003: 30(1-4), 2004/2005: 31(1-4), 2005: 32(1-4), 2006: 33(1-4), 2007: 34(1-4), 2008: 35(1-4), 2009: 36(1-8), 2010: 37(1-8), 2011: 38(1-8), 2012: 39(1-12), 2013: 40(1-9, 12), 2014: 41(1-12), 2015: 42(2-12), 2016: 43(1-12), 2017: 44(1-6), 2018: 45(1-6), 2019: 46(1-6), 2020: 47(1-12), 2021: 48(1-12), 2022: 49(1-12), 2023: 50(1, S 1, 2-12), 2024: 51(1), 2025: 52(1), 2026: 53(1)
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LOCKSS Archive
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In Progress
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2026-04-13
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39, 46
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LOCKSS Archive
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Preserved
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2026-04-13
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40 to 45
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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 9, 11, 12); 5 (Suppl 1, 1 to 9, 11, 12); 24 (1, 3, 4); 25 (1 to 4); 26 (1, 3, 4); 27 (1 to 4); 28 (1 to 4); 29 (1, 3, 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1)
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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 9, 11, 12); 5 (Suppl 1, 1 to 9, 11, 12); 24 (1, 3, 4); 25 (1 to 4); 26 (1, 3, 4); 27 (1 to 4); 28 (1 to 4); 29 (1, 3, 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 8); 37 (1 to 8); 38 (1 to 8); 39 (1 to 9, 11, 12); 41 (1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1)
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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 : 5 (2); 24 (1, 3, 4); 25 (1-4); 26 (1, 3, 4); 27 (1-4); 28 (1-4); 29 (1, 3, 4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1, 3, 4); 35 (1-4); 36 (1-8); 37 (1-8); 38 (1-8); 39 (1-12); 40 (1-12); 41 (1-12); 42 (1-11); 43 (1-12); 44 (1-6); 45 (1-6); 46 (1-5)
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Library of Congress
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Preserved
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2025-04-07
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37 (1 to 8); 38 (1 to 8); 39 (1 to 12); 40 (1 to 12); 41 (1 to 12); 42 (1 to 12); 43 (1 to 12); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (1 to 12); 48 (1 to 12); 49 (1 to 12); 50 (1, S1, 2 to 12); 51 (1); 52 (1)
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