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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1, 2); 2 (1, 2); 3 (1, 2); 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, 3, 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 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (s1, 1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4); 60 (1 to 4); 61 (1 to 6); 62 (1 to 4, 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 6); 66 (1 to 6); 67 (1 to 6)
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Internet Archive
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Preserved
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2025-08-08
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1 to 64
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Portico
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Preserved
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2026-04-16
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Preserved : 1951: 1(1-2), 1952: 2(1-2), 1953: 3(1-2), 1954: 4(1-4), 1955: 5(1-4), 1956: 6(1-4), 1957: 7(1-4), 1958: 8(1-4), 1959: 9(1-4), 1960: 10(1-4), 1961: 11(1-4), 1962: 12(1-4), 1963: 13(1-4), 1964: 14(1-4), 1965: 15(1-4), 1966: 16(1-4), 1967: 17(1-4), 1968: 18(1-4), 1969: 19(1-4), 1970: 20(1-4), 1971: 21(1-4), 1972: 22(1-4), 1973: 23(1-4), 1974: 24(1-4), 1975: 25(1-4), 1976: 26(1-4), 1977: 27(1-4), 1978: 28(1-4), 1979: 29(1-4), 1980: 30(1-4), 1981: 31(1-4), 1982: 32(1-4), 1983: 33(1-4), 1984: 34(1-4), 1985: 35(1-4), 1986: 36(1-4), 1987: 37(1-4), 1988: 38(1-4), 1989: 39(1-4), 1990: 40(1-4), 1991: 41(1-4), 1992: 42(1-4), 1993: 43(1-4), 1994: 44(1-4), 1995: 45(1-4), 1996: 46(1-4), 1997: 47(1-4), 1998: 48(1-4), 1999: 49(1-4), 2000: 50(1-4), 2001: 51(1-4), 2002: 52(1-4), 2003: 53(1-4), 2004: 54(1-4), 2005: 55(1-4), 2006: 56(1-4), 2007: 57(1-4), 2008: 58(1-4), 2009: 59(1-4), 2010: 60(1-4), 2011: 61(1-6), 2012: 62(1-6), 2013: 63(1-6), 2014: 64(1-6), 2015: 65(1-6), 2016: 66(1-6), 2017: 67(1-6)
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CLOCKSS Archive
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Preserved
|
2026-04-13
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27, 28, 41 to 67
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Portico
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Preserved
|
2026-04-16
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Preserved : 1951: 1(1-2), 1952: 2(1-2), 1953: 3(1-2), 1954: 4(1-4), 1955: 5(1-4), 1956: 6(1-4), 1957: 7(1-4), 1958: 8(1-4), 1959: 9(1-4), 1960: 10(1-4), 1961: 11(1-4), 1962: 12(1-3), 1963: 13(1-4), 1964: 14(1-4), 1965: 15(1-4), 1966: 16(1-4), 1967: 17(1-4), 1968: 18(2-4), 1969: 19(1-4), 1970: 20(1-4), 1971: 21(1-4), 1972: 22(1-4), 1973: 23(1-4), 1974: 24(1-2, 4), 1975: 25(1-4), 1976: 26(1-2, 4), 1977: 27(1-4), 1978: 28(1-4), 1979: 29(1-4), 1980: 30(1-4), 1981: 31(1-4), 1982: 32(1-4), 1983: 33(1-4), 1984: 34(1-4), 1985: 35(1-4), 1986: 36(1-4), 1987: 37(1-4), 1988: 38(1-4), 1989: 39(1-4), 1990: 40(1-4), 1991: 41(1-4), 1992: 42(1-4), 1993: 43(1-4), 1994: 44(1-4), 1995: 45(1-4), 1996: 46(1-4), 1997: 47(1-4), 1998: 48(1-4), 1999: 49(1-4), 2000: 50(1-4), 2001/2006: 51(1-4), 2002: 52(1-4), 2006: 53(1-4), 2006: 54(1-4), 2005: 55(1-4), 2006: 56(1-4), 2007: 57(1-4), 2008: 58(1-4), 2009: 59(1-4), 2010: 60(1-4), 2011: 61(1-6), 2012: 62(1-6), 2013: 63(1-6), 2014: 64(1-6), 2015: 65(1-6), 2016: 66(1-6), 2017: 67(1-6), 2018: 68(1-6), 2019: 69(1-6), 2020: 70(1-6), 2021: 71(1-6), 2022: 72(1-6), 2023: 73(1-6), 2024: 74(1-6), 2025: 75(1-6), 2026: 76(1)
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LOCKSS Archive
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Preserved
|
2026-04-13
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1 to 7, 55
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CLOCKSS Archive
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Preserved
|
2026-04-13
|
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1, 73, 75, 76
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CLOCKSS Archive
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In Progress
|
2026-04-13
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2 to 8
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LOCKSS Archive
|
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In Progress
|
2026-04-13
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8, 9
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Technische Informationsbibliothek
|
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Preserved
|
2026-01-13
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vol.47:1-4;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,sup.s1;vol.57:1-4;vol.58:1-4;vol.59:1-4;vol.60:1-4;vol.61:1-6;vol.62:1-6;vol.63:1-6;vol.64:1-6;vol.65:1-6;vol.66:1-6;vol.67:1-6
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National Digital Preservation Program, China
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Preserved
|
2025-10-23
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Preserved : 7 (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 4)
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National Digital Preservation Program, China
|
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Preserved
|
2025-12-04
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Preserved : 7 (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 4)
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National Library of the Netherlands
|
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Preserved
|
2024-12-15
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Preserved : 56 (s1, 1-4); 57 (1-4)
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British Library
|
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Preserved
|
2019-09-18
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Preserved : 68 (4 to 5)
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