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Scholars Portal
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Preserved
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2026-06-02
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Preserved : 1 (2); 2 (1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 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 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 to 4); 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 3); 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 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 70 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 80 (1 to 4); 81 (1)
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Internet Archive
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Preserved
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2026-07-13
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16 to 58
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Technische Informationsbibliothek
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Preserved
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2026-06-04
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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.60:1-4;vol.61:1-4;vol.62:1-4;vol.63:1-4;vol.64:1-4;vol.65:1-4;vol.66:1-4;vol.67:1-4;vol.68:1-4;vol.69:1-4;vol.70:1-4;vol.71:1-4;vol.72:1-4;vol.73:1-4;vol.74:1-4;vol.75:1-4
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Portico
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Preserved
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2026-07-09
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Preserved : 1946: 1(1-2), 1947: 2(1-4), 1948: 3(1-4), 1949: 4(1-4), 1950: 5(1-4), 1951: 6(1-4), 1952: 7(1-4), 1953: 8(1-4), 1954: 9(1-4), 1955: 10(1-4), 1956: 11(1-4), 1957: 12(1-4), 1958: 13(1-4), 1959: 14(1-4), 1960: 15(1-4), 1961: 16(1-4), 1962: 17(1-4), 1963: 18(1-4), 1964: 19(1-4), 1965: 20(1-4), 1966: 21(1-4), 1967: 22(1-4), 1968: 23(1-4), 1969: 24(1-4), 1970: 25(1-4), 1971: 26(1-4), 1972: 27(1-4), 1973: 28(1-4), 1974: 29(1-4), 1975: 30(1-4), 1976: 31(1-4), 1977: 32(1-4), 1978: 33(1-4), 1979: 34(1-4), 1980: 35(1-4), 1981: 36(1-4), 1982: 37(1-4), 1983: 38(1-4), 1984: 39(1-4), 1985: 40(1-4), 1986: 41(1-4), 1987: 42(1-4), 1988: 43(1-4), 1989: 44(1-4), 1990: 45(1-4), 1991: 46(1-4), 1992: 47(1-4), 1993: 48(1-4), 1994: 49(1-4), 1995: 50(1-4), 1996: 51(1-4), 1997: 52(1-4), 1998: 53(1-4), 1999: 54(1-4), 2000: 55(1-4), 2001: 56(1-4), 2002: 57(1-4), 2003: 58(1-4), 2004: 59(1-4), 2005: 60(1-4), 2006: 61(1-4), 2007: 62(1-4), 2008: 63(1-4), 2009: 64(1-4), 2010: 65(1-4), 2011: 66(1-4), 2012: 67(1-4), 2013: 68(1-4), 2014: 69(1-4), 2015: 70(1-4), 2016: 71(1-4), 2017: 72(1-4), 2018: 73(1-4), 2019: 74(1-4), 2020: 75(1-4), 2021: 76(1-4), 2022: 77(1-4), 2023: 78(1-4), 2024: 79(1-4), 2025: 80(1-4), 2026: 81(1-3)
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CLOCKSS Archive
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Preserved
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2026-07-06
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31, 33, 46 to 81
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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 : 6 (1 to 4); 7 (1 to 4); 8 (1 to 3); 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); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (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 : 6 (1 to 4); 7 (1 to 4); 8 (1 to 3); 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); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4)
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Internet Archive
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Preserved
|
2026-07-13
|
|
|
31
|
|
|
National Library of the Netherlands
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Preserved
|
2024-12-15
|
|
|
Preserved : 61 (1-4); 62 (1-3)
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