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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 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 4); 49 (, 1 to 4); 50 (, 1 to 4); 51 (, 1 to 4); 52 (, 1 to 4); 53 (, 1 to 4); 54 (, 1 to 4); 55 (, 1 to 4); 56 (, 1 to 4); 57 (, 1 to 4); 58 (, 1 to 4); 59 (, 1 to 4); 60 (, 1-2, 3, 4); 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018
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Internet Archive
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Preserved
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2025-08-08
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14 to 54
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 68
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Portico
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Preserved
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2026-02-12
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Preserved : 1952: 1(1), 1953: 2(1), 1956: 3(1), 1962: 4(1), 1963: 5(1-2), 1964: 6(1-2), 1965: 7(1-2), 1966: 8(1-2), 1967: 9(1-2), 1968: 10(1-2), 1969: 11(1-2), 1970: 12(1-2), 1971/1972: 13(1, S1, 2), 1972/1973: 14(1-2), 1973: 15(1-2), 1974/1975: 16(1-2), 1975/1976: 17(1-2), 1976/1977: 18(1-2), 1977/1978: 19(1-2), 1978/1979: 20(1-2), 1979/1980: 21(1-2), 1980: 22(1-2, S2), 1981: 23(1-2), 1982: 24(1-2), 1983: 25(1-2, S3), 1984: 26(1-2), 1985: 27(1-2), 1986: 28(1-2), 1987: 29(1-2), 1988: 30(1-2), 1989: 31(1-2), 1990: 32(1-2), 1991: 33(1-2), 1992: 34(1-2), 1993: 35(1-2), 1994: 36(1-2), 1995: 37(1-2), 1996: 38(1-2), 1997: 39(1-2), 1998: 40(1-3), 1999: 41(1-3), 2000: 42(1-3), 2001: 43(1-3), 2002: 44(1-3), 2003: 45(1-3), 2004: 46(1-3), 2005: 47(1-3), 2006: 48(1-4), 2007: 49(1-4), 2008: 50(1-4), 2009: 51(1-4), 2010: 52(1-4), 2011: 53(1-4), 2012: 54(1-4), 2013: 55(1-4), 2014: 56(1-4), 2015: 57(1-4), 2016: 58(1-4), 2017: 59(1-4), 2018: 60(1-4), 2019: 61(1-4), 2020: 62(1-4), 2021: 63(1-4), 2022: 64(1-4), 2023: 65(1-4), 2024: 66(1-4), 2025: 67(1-4), 2026: 68(1-2)
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CLOCKSS Archive
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Preserved
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2026-02-09
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42 to 60
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Portico
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Preserved
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2026-02-12
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Preserved : 2000: 42(1-3), 2001: 43(1-3), 2002: 44(1-3), 2003: 45(1-3), 2004: 46(1-3), 2005: 47(1-3), 2006: 48(1-4), 2007: 49(1), 2008: 50(1), 2009: 51(1), 2010: 52(1-3), 2011: 53(1-3), 2012: 54(1-3), 2013: 55(1-3), 2014: 56(1-4), 2015: 57(1-4), 2016: 58(1-4), 2017: 59(1-4), 2018: 60(1-4)
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LOCKSS Archive
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In Progress
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2026-02-09
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54
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LOCKSS Archive
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Preserved
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2026-02-09
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55 to 59
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.39:1-2;vol.40:1-3;vol.41:1-3;vol.42:1-3;vol.43:1-3;vol.44:1-3;vol.45:1-3;vol.46:1-3;vol.47:1-3;vol.48:1-4;vol.49:1-4;vol.50:1-4;vol.51:1-4;vol.52:1-4;vol.53:1-4;vol.54:1-4;vol.55:1-4;vol.56:1-4;vol.57:1-4;vol.58:1-4;vol.59:1-4;vol.60:3-4,1-2;vol.61:1-4;vol.62:1-4
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Library of Congress
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Preserved
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2025-04-07
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60 (1-2, 3, 4)
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National Digital Preservation Program, China
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Preserved
|
2025-10-23
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Preserved : 4 (1 to 3); 5 (1 to 4); 6 (1-2, 3, 4); 39 (1, 2); 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 4); 49 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4)
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National Digital Preservation Program, China
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Preserved
|
2025-12-04
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Preserved : 4 (1 to 3); 5 (1 to 4); 6 (1-2, 3, 4); 39 (1, 2); 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 4); 49 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4)
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National Library of the Netherlands
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Preserved
|
2024-12-15
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Preserved : 42 (2, 3); 43 (1-3); 44 (1-3); 45 (1-3); 46 (1-3); 47 (1-3); 48 (1-4); 49 (1, 3, 4); 50 (1-4); 51 (1-4); 52 (1-4); 53 (1-4); 54 (1-4); 55 (1-4); 56 (1-4); 57 (1-4); 58 (1-4); 59 (1-4); 60 (1-2, 3, 4)
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