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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 2 (2 to 7); 3 (1 to 6); 4 (1 to 3); 5 (1 to 5); 6 (1 to 4, 5-6); 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 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 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 5); 38 (1 to 5); 39 (1 to 5); 40 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 5); 44 (1 to 5); 45 (1 to 5); 46 (1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 50 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 5); 56 (2 to 5); 57 (1 to 5); 58 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 46
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Portico
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Preserved
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2026-05-07
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Preserved : 1967/1968: 2(1-7), 1968/1969: 3(1-6), 1969/1970: 4(1-3)
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CLOCKSS Archive
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Preserved
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2026-05-04
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2 to 58
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Portico
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Preserved
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2026-05-07
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Preserved : 1971/1972: 5(1-5), 1972/1973: 6(1-6), 1974: 7(1-4), 1975: 8(1-4), 1976: 9(1-4), 1978: 10(1-4), 1979: 11(1-4), 1980: 12(1-4), 1981: 13(1-4), 1982: 14(1-4), 1983: 15(1-4), 1984: 16(1-4), 1985: 17(1-4), 1986: 18(1-4), 1987: 19(1-4), 1988: 20(1-4), 1989: 21(1-4), 1990: 22(1-4), 1991: 23(1-4), 1992: 24(1-4), 1993: 25(1-4), 1994: 26(1-4), 1995: 27(1-4), 1996: 28(1-4), 1997: 29(1-4), 1998: 30(1-4), 1999: 31(1-4), 2000: 32(1-4), 2001: 33(1-4), 2002: 34(1-4), 2003: 35(1-4), 2004: 36(1-4), 2005: 37(1-5), 2006: 38(1-5), 2007: 39(1-5), 2008: 40(1-5), 2009: 41(1-5), 2010: 42(1-5), 2011: 43(1-5), 2012: 44(1-3, 5), 2013: 45(1-2, 4-5), 2014: 46(1-5), 2015: 47(1-5), 2016: 48(1-5), 2017: 49(1-5), 2018: 50(1-5), 2019: 51(1-5), 2019/2020: 52(1-5), 2021: 53(1-5), 2022: 54(1-5), 2023: 55(1-5), 2024: 56(1-5), 2025: 57(1-5), 2026: 58(1)
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LOCKSS Archive
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In Progress
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2026-05-04
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44
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LOCKSS Archive
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Preserved
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2026-05-04
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45 to 51
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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); 50 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 5); 56 (1 to 4)
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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 5); 5 (1 to 5); 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 5); 38 (1 to 5); 39 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 5); 44 (1 to 5); 45 (1 to 5); 46 (1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 5); 56 (1 to 5)
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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 5); 5 (1 to 5); 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 5); 38 (1 to 5); 39 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 5); 44 (1 to 5); 45 (1 to 5); 46 (1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 5); 56 (1 to 5)
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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 (1-4); 30 (1, 3, 4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1, 4); 37 (1-5); 38 (1-5); 39 (2-5); 40 (1-5); 41 (1-5); 42 (1-5); 43 (1-5); 44 (1-5); 45 (1-5); 46 (1-5); 47 (1-5); 48 (1-5); 49 (1-5); 50 (1-5); 51 (1-5)
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