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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1 to 4); 2 (, 1‐2, 3‐4); 3 (, 1‐2, 3‐4); 4 (, 1‐2, 3‐4); 5 (, 1‐2, 3‐4); 6 (, 1 to 4); 7 (, 1 to 4); 8 (, 1 to 4); 9 (, 1 to 4); 10 (, 1); 11 (, 1); 12 (, 1); 13 (, 1); 14 (, 1); 15 (, 1); 16 (, 1); 17 (, 1); 18 (, 1); 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 (, 1‐3, 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 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1, 2); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 4); 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); 61 (, 1 to 6); 62 (, 1 to 6); 63 (, 1 to 6); 64 (, 1 to 6); 65 (, 1 to 6); 66 (, 1 to 4 to 6); 67 (, 1 to 6); 68 (, 1 to 6); 69 (, 1 to 6); 70 (, 1, 3 to 6); 71 (, 1 to 6); 72 (, 1 to 6); 73 (, 1 to 6); 74 (, 1 to 6); 75 (, 1 to 6); 76 (, 1 to 6); 77 (, 1 to 6); 78 (, 2 to 6); 79 (, 1 to 6); 80 (, 1 to 6); 81 (, 1 to 6); 82 (, 1 to 6); 83 (, 1 to 6); 84 (, 1 to 6); 85 (, 1, 2, 3-4, 5, 6); 86 (, 1 to 6); 87 (, 1-2, 3 to 6); 88 (, 1 to 6); 89 (, 1, 2-3, 4); 1925; 1926; 1927; 1928; 1930; 1931; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1943; 1946; 1947; 1949; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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53 to 71
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.61:1-6;vol.62:1-6;vol.63:1-6;vol.64:1-6;vol.65:1-6;vol.66:1-4,5-6;vol.67:1-6;vol.68:1-6;vol.69:1-6;vol.70:1-6;vol.71:1-6;vol.72:1-6;vol.73:1-6;vol.74:1-6;vol.75:1-6;vol.76:1-6;vol.77:1-6;vol.78:1-6;vol.79:1-6;vol.80:1-6;vol.81:1-6;vol.82:1-6;vol.83:1-6;vol.84:1-6;vol.85:1
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 18, 20, 21, 55 to 90
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Portico
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Preserved
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2026-02-12
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Preserved : 1954/1955: 19(1-4), 1955/1956: 20(1-4), 1956/1957: 21(1-4), 1957/1958: 22(1-4), 1958/1959: 23(1-4), 1959/1960: 24(1-4), 1961/1962: 25(1-4), 1962/1963: 26(1-4), 1963: 27(1-4), 1964/1965: 28(1-4), 1965/1966: 29(1-4), 1966/1967: 30(1-4), 1967/1968: 31(1-4), 1968/1969: 32(1-4), 1969/1970: 33(1-4), 1970/1971: 34(1-4), 1971/1972: 35(1-4), 1972/1973: 36(1-4), 1973/1974: 37(1-4), 1974/1975: 38(1-4), 1975/1976: 39(1-4), 1976/1977: 40(1-4), 1977/1978: 41(1-4), 1978/1979: 42(1-4), 1979/1980: 43(1-4), 1980: 44(1-2), 1981: 45(1-4), 1982: 46(1-4), 1983: 47(1-4), 1984: 48(1-4), 1985: 49(1-4), 1986: 50(1-4), 1987: 51(1-4), 1988: 52(1-4), 1989: 53(1-4), 1990: 54(1-4), 1991: 55(1-4), 1992: 56(1-4), 1993: 57(1-4), 1994: 58(1-4), 1995: 59(1-4), 1996: 60(1-6), 1997: 61(1-6), 1998: 62(1-6), 1999: 63(1-6), 2000: 64(1-6), 2001: 65(1-6), 2002: 66(1-4), 2003: 67(1-6), 2004: 68(1-6), 2005: 69(1-6), 2006: 70(1-6), 2007: 71(1-6), 2008: 72(1-6), 2009: 73(1-6), 2010: 74(1-6), 2011: 75(1-6), 2012: 76(1-6), 2013: 77(1-6), 2014: 78(1-6), 2015: 79(1-6), 2016: 80(1-6), 2017: 81(1-6), 2018: 82(1-6), 2019: 83(1-6), 2020: 84(1-6), 2021: 85(1-6), 2022: 86(1-6), 2023: 87(1-6), 2024: 88(1-6), 2025: 89(1-6), 2026: 90(1-2)
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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 : 7 (1 to 6); 8 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 4, 5?6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 6); 84 (1 to 6); 85 (1, 2, 3-4, 5, 6); 86 (1 to 6); 87 (1-2, 3 to 6); 88 (1 to 6); 89 (1, 2-3, 4 to 6)
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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 : 7 (1 to 6); 8 (1 to 6); 61 (1 to 6); 62 (1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 4, 5?6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 71 (1 to 6); 72 (1 to 6); 73 (1 to 6); 74 (1 to 6); 75 (1 to 6); 76 (1 to 6); 77 (1 to 6); 78 (1 to 6); 79 (1 to 6); 81 (1 to 6); 82 (1 to 6); 83 (1 to 6); 84 (1 to 6); 85 (1, 2, 3-4, 5, 6); 86 (1 to 6); 87 (1-2, 3 to 6); 88 (1 to 6); 89 (1, 2-3, 4, 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 : 70 (1-6); 71 (1, 2, 5, 6)
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