Scholars Portal
1949-2025
Preserved
2026-03-19
Preserved : 1 (1, 2); 2 (1, 2); 3 (1, 2); 4 (1, 2); 5 (1, 2); 6 (1, 2); 7 (1, 2); 8 (1, 2); 9 (1, 2); 10 (1 to 3); 11 (1, 2); 12 (1, 2); 13 (1, 2); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1 to 3); 20 (1 to 3); 21 (1 to 3); 22 (1 to 3); 23 (1 to 3); 24 (1 to 3); 25 (1 to 3); 26 (1 to 3); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 30 (1 to 3); 31 (1 to 3); 33; 37 (1 to 3); 38 (1 to 3); 39 (1 to 3); 40 (1 to 4); 41 (1 to 3); 42 (1 to 3); 43 (1 to 3); 44 (1 to 3); 45 (1 to 3); 46 (sup1, 1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (sup1, 1 to 3); 50 (1 to 3); 51 (sup1, 1 to 3); 52 (sup1, 1 to 3); 53 (S1, 1 to 3); 54 (S1, 1 to 3); 55 (sup1, 1 to 3); 56 (S1, 1 to 3); 57 (sup1, 1 to 3); 58 (sup1, 1 to 3); 59 (sup1, 1 to 3); 60 (sup1, 1 to 3); 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); 75; 76; 77
Technische Informationsbibliothek
1997-2020
Preserved
2026-01-13
vol.49:1-3,S1;vol.50:1-3;vol.51:1-3,S1;vol.52:1-3,S1;vol.53:1-3,S1;vol.54:1-3,S1;vol.55:1-3,S1;vol.56:1-3,S1;vol.57:1-3,S1;vol.58:1-3,S1;vol.59:1-3,S1;vol.60:1-3,S1;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
Portico
1949-2020
Preserved
2026-04-16
Preserved : 1949/1950: 1(1-2), 1950: 2(1-2), 1951: 3(1-2), 1952: 4(1-2), 1953: 5(1-2), 1954: 6(1-2), 1955: 7(1-2), 1956: 8(1-2), 1957: 9(1-2), 1958: 10(1-3), 1959: 11(1-2), 1960: 12(1-2), 1961: 13(1-2), 1962: 14(1-3), 1963: 15(1-3), 1964: 16(1-3), 1965: 17(1-3), 1966: 18(1-3), 1967: 19(1-3), 1968: 20(1-3), 1969: 21(1-3), 1970: 22(1-3), 1971: 23(1-3), 1972: 24(1-3), 1973: 25(1-3), 1974: 26(1-3), 1975: 27(1-3), 1976: 28(1-3), 1977: 29(1-3), 1978: 30(1-3), 1979: 31(1-3), 1980: 32(1-3), 1981: 33(1-3), 1982: 34(1-3), 1983: 35(1-3), 1984: 36(1-3), 1985: 37(1-3), 1986: 38(1-3), 1987: 39(1-3), 1988: 40(1-4), 1989: 41(1-3), 1990: 42(1-3), 1991: 43(1-3), 1992: 44(1-3), 1993: 45(1-3), 1994: 46(1-3), 1995: 47(1-3), 1996: 48(1-3), 1997: 49(1, S 1, 2-3), 1998: 50(1-3), 1999: 51(1-3), 2000: 52(1-3), 2001: 53(1, S 1, 2-3), 2002: 54(1, S 1, 2-3), 2003: 55(1, S 1, 2-3), 2004: 56(1, S 1, 2-3), 2005: 57(1-3), 2006: 58(1-3), 2007: 59(1-3), 2008: 60(1-3), 2009: 61(1-3), 2010: 62(1-4), 2011: 63(1-4), 2012: 64(1-4), 2013: 65(1-4), 2014: 66(1-4), 2015: 67(1-4), 2016: 68(1-4), 2017: 69(1-4), 2018: 70(1-4), 2019: 71(1-4), 2020: 72(1-4)
CLOCKSS Archive
1984-2020
Preserved
2026-04-13
36, 43 to 72
CLOCKSS Archive
1949-2025
Preserved
2026-04-13
1 to 77
LOCKSS Archive
1949-2025
Preserved
2026-04-13
1 to 77
LOCKSS Archive
2026-2026
In Progress
2026-04-13
78
Portico
1949-1959
Preserved
2026-04-16
Preserved : 1949/1950: 1(1-2), 1950: 2(1-2), 1951: 3(2), 1952: 4(1-2), 1953: 5(1-2), 1954: 6(1), 1955: 7(1-2), 1956: 8(1), 1957: 9(1), 1958: 10(1), 1959: 11(1)
Portico
1966-1966
Preserved
2026-04-16
Preserved : 1966: 18(2)
Portico
1994-1995
Preserved
2026-04-16
Preserved : 1994: 46(sup1), 1995: 47(1)
Portico
1996-2007
Preserved
2026-04-16
Preserved : 1996: 48(1-3), 1997: 49(1-3), 1998: 50(1-3), 1999: 51(1-3), 2000: 52(1-3), 2001: 53(1-3), 2002: 54(1-3), 2003: 55(1-3), 2004: 56(1-3), 2005: 57(1-3), 2006: 58(1-3), 2007: 59(1-3), 2007: 60(1)
Portico
2008-2010
Preserved
2026-04-16
Preserved : 2008: 60(2-3), 2008: 60 Suppl 1, 2009: 61(1-4), 2010: 62(1-4)
Portico
2016-2026
Preserved
2026-04-16
Preserved : 2016: 68(1-4), 2017: 69(1-4), 2018: 70(1-4), 2019: 71(1-4), 2020: 72(1-4), 2021: 73(1-4), 2022: 74(1), 2023: 75(1), 2024: 76(1), 2025: 77(1), 2026: 78(1)
National Digital Preservation Program, China
1997-2024
Preserved
2025-12-04
Preserved : 5 (2, 3); 6 (sup1, 1 to 3); 7 (1 to 4); 49 (sup1, 1 to 3); 51 (sup1, 1 to 3); 52 (sup1, 1 to 3); 53 (sup1, 1 to 3); 54 (1 to 3); 55 (1 to 3); 56 (1 to 3); 57 (sup1, 1 to 3); 58 (sup1, 1 to 3); 59 (sup1, 1 to 3); 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); 76
Library of Congress
2011-2023
Preserved
2025-04-07
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); 75 (1)
National Library of the Netherlands
1949-2008
Preserved
2024-12-15
Preserved : 1 (1, 2); 2 (1, 2); 3 (1, 2); 4 (1, 2); 5 (1, 2); 6 (1, 2); 7 (1, 2); 8 (1, 2); 9 (1, 2); 10 (1-3); 11 (1, 2); 12 (1, 2); 13 (1, 2); 14 (1-3); 15 (1-3); 16 (1-3); 17 (1-3); 18 (1-3); 19 (1-3); 20 (1-3); 21 (1-3); 22 (1-3); 23 (1-3); 24 (1-3); 25 (1, 3); 26 (1-3); 27 (1-3); 28 (1-3); 29 (1-3); 30 (1-3); 31 (1-3); 32 (1-3); 33 (1-3); 34 (1-3); 35 (1-3); 36 (1-3); 37 (1-3); 38 (1-3); 39 (1-3); 40 (1-4); 41 (1-3); 42 (1-3); 43 (1-3); 44 (1-3); 45 (1-3); 46 (1-3); 47 (1-3); 48 (1-3); 49 (1-3); 50 (1-3); 51 (1-3); 52 (1-3); 53 (1-3); 54 (1-3); 55 (1-3); 56 (1-3); 57 (1-3); 58 (1-3); 59 (1-3); 60 (1-3)