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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 6); 2 (, 1 to 4); 3 (, 1, 2); 4 (, 1, 2); 5 (, 1, 2); 6 (, 1, 2); 7 (, 1, 2); 8 (, 1, 2); 9 (, 1, 2); 10 (, 1, 2); 11 (, 1, 2); 12 (, 1, 2); 13 (, 1, 2); 14 (, 1); 15 (, 1, 2); 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, 2, 3-4); 26 (, 1 to 4); 27 (, 1 to 4); 28 (, 1, 2, 3-4); 29 (, 1 to 4); 30 (, 1, 2, 3-4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (, 1 to 4); 34 (, 1-2, 3, 4); 35 (, 1, 2, 3-4); 36 (, 1, 2, 3-4); 37 (, 1 to 4); 38 (, 1, 2, 3-4); 39 (, 1, 2, 3-4); 40 (, 1 to 5); 41 (, 1, 2, 3-4, 5); 42 (, 1, 2, 3-4, 5); 43 (, 1, 2-3, 4, 5); 44 (, 1 to 6); 45 (, 1, 2-3, 4, 5-6); 46 (, 1, 2‐3, 4 to 6); 47 (, 1, 4 to 6); 48 (, 1, 2-3, 4 to 6); 49 (, 1 to 3, 4-5, 6); 50 (, 1 to 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (, 1 to 6); 55 (, 1 to 12); 56 (, 1 to 12); 57 (, 1 to 12); 58 (, 1 to 12); 59 (, 1 to 12); 60 (, 1 to 6); 1951; 1961; 1962; 1963; 1964; 1966; 1967; 1968; 1970; 1972; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 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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14 to 43
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.32:1-4;vol.33:1-4;vol.34:3-4,1-2;vol.35:1-2,3-4;vol.36:1-2,3-4;vol.37:1-4;vol.38:1-2,3-4;vol.39:1-2,3-4;vol.40:1-5;vol.41:1-2,5,3-4;vol.42:1-2,5,3-4;vol.43:1-1,4-5,2-3;vol.44:1-6;vol.45:1-1,4,2-3,5-6;vol.46:1-1,4-6,2-3;vol.47:1-1,4-6,2-3;vol.48:1-1,4-6,2-3;vol.49:1-3,6,4-5;vol.50:1-6;vol.51:1-6,sup.S1;vol.52:1-6,sup.S1;vol.53:1-6,sup.S1,sup.S2;vol.54:1-6;vol.55:1-12
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Portico
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Preserved
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2026-02-12
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Preserved : 1951/1952/1953/1954/1956/1957: 1(1-6), 1961: 2(1-4)
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Portico
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Preserved
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2026-02-12
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Preserved : 1962/1963: 3(1-2), 1964/1965: 4(1-2), 1966/1967: 5(1-2), 1968/1969: 6(1-2), 1970/1971: 7(1-2), 1972/1973: 8(1-2), 1974: 9(1-2), 1975: 10(1-2), 1976: 11(1-2), 1977: 12(1-2), 1978: 13(1-2), 1979: 14(1-2), 1980: 15(1-2), 1981: 16(1-4), 1982: 17(1-4), 1983: 18(1-4), 1984: 19(1-4), 1985: 20(1-4), 1986: 21(1-4), 1987: 22(1, S 1, 2, S 2, 3-4), 1988: 23(1-4), 1989: 24(1-4), 1990: 25(1-4), 1991: 26(1-4), 1992: 27(1-4), 1993: 28(1-4), 1994: 29(1-4), 1995: 30(1-4), 1996: 31(1-4), 1997: 32(1-4), 1998: 33(1-4), 1999: 34(1-4), 2000: 35(1-4), 2001: 36(1-4), 2002: 37(1-4), 2003: 38(1-4), 2004: 39(1-4), 2005: 40(1-5), 2006: 41(1-5), 2007: 42(1-5), 2008: 43(1-5), 2009: 44(1-6), 2010: 45(1-6), 2011: 46(1-6), 2012: 47(1-6), 2013: 48(1-6), 2014: 49(1-6), 2015: 50(1-6), 2016: 51(1, S1, 2-6), 2017: 52(1, S1, 2-6), 2018: 53(1, S1, 2, S2, 3-6), 2019: 54(1-6), 2020: 55(1-12), 2021: 56(1-12), 2022: 57(1-12), 2023: 58(1-12), 2024: 59(1-12), 2025: 60(1-12), 2026: 61(1)
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CLOCKSS Archive
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Preserved
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2026-02-09
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8, 13, 26 to 61
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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 : 4 (1 to 5); 5 (1 to 6); 6 (1 to 9); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1?2, 3, 4); 35 (1, 2, 3?4); 36 (1, 2, 3?4); 37 (1 to 4); 38 (1, 2, 3?4); 39 (1, 2, 3?4); 41 (1, 2, 3?4, 5); 42 (1, 2, 3?4, 5); 43 (1, 2?3, 4, 5); 44 (1 to 6); 45 (1, 2?3, 4, 5?6); 46 (1, 2?3, 4 to 6); 47 (1, 2-3, 4 to 6); 48 (1, 2-3, 4 to 6); 49 (1 to 3, 4-5, 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (1 to 6); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12)
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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 : 4 (1 to 5); 5 (1 to 6); 6 (1 to 9); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1?2, 3, 4); 35 (1, 2, 3?4); 36 (1, 2, 3?4); 37 (1 to 4); 38 (1, 2, 3?4); 39 (1, 2, 3?4); 41 (1, 2, 3?4, 5); 42 (1, 2, 3?4, 5); 43 (1, 2?3, 4, 5); 44 (1 to 6); 45 (1, 2?3, 4, 5?6); 46 (1, 2?3, 4 to 6); 47 (1, 2-3, 4 to 6); 48 (1, 2-3, 4 to 6); 49 (1 to 3, 4-5, 6); 51 (, 1 to 6); 52 (, 1 to 6); 53 (, 1 to 6); 54 (1 to 6); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12)
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