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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; 3; 4; 5; 6; 7; 8; 9 (2 to 4); 10 (1‐2, 3, 4); 11 (1‐2, 3, 4); 12 (s1, 1, 2, 3‐4); 13 (1, 2); 14 (1, 2‐4); 15 (1, 2, 3‐4); 16 (1‐2, 3‐4); 17 (1‐2, 3‐4); 18 (1‐2, 3‐4); 19 (1, 2‐4); 20 (1); 21 (2); 22 (1); 23 (2 to 4); 24 (1 to 4); 25 (1‐2, 3, 4); 26 (1); 27 (2 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, 2); 43 (1 to 3); 44 (1, 2); 45 (1, 2); 46 (1 to 3); 47 (1 to 3); 48 (1 to 3); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 55; 56 (1 to 6); 57 (1 to 4); 58 (1 to 6); 59 (1 to 6); 60 (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 6); 67 (1 to 6); 68 (1 to 6); 69 (1 to 6); 70 (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); 80 (1 to 6); 81 (1)
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Internet Archive
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Preserved
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2025-08-08
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21 to 40
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Gallica
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Preserved
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2026-04-20
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Preserved : 1956-01-01-1956-01-01
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.52:1-6;vol.53:1-6;vol.54:1-6;vol.55:1-6;vol.56:1-6;vol.57:1-6;vol.58:1-6;vol.59:1-6;vol.60:1-6;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;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
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Portico
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Preserved
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2026-04-23
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Preserved : 1943: 1(1), 1944: 2(1), 1945: 3(1), 1946: 4(1), 1947: 5(1), 1948: 6(1), 1949: 7(1), 1950: 8(1), 1954: 9(1-4), 1955: 10(1-4), 1956: 11(1-4), 1957: 12(1-4), 1958: 13(1-2), 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), 1966: 21(1-4), 1967: 22(1)
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CLOCKSS Archive
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Preserved
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2026-04-27
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4, 33, 46 to 81
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Portico
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Preserved
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2026-04-23
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Preserved : 1968: 23(1-4), 1969: 24(1-4), 1970: 25(1-4), 1971: 26(1), 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(1-2), 1988: 43(1-3), 1989: 44(1-2), 1990: 45(1-2), 1991: 46(1-3), 1992: 47(1-3), 1993: 48(1-3), 1994: 49(1-6), 1995: 50(1-6), 1996: 51(1-6), 1997: 52(1-6), 1998: 53(1-6), 1999: 54(1-6), 2000: 55(1-6), 2001: 56(1-6), 2002: 57(1-6), 2003: 58(1-6), 2004: 59(1-6), 2005: 60(1-6), 2006: 61(1-6), 2007: 62(1-6), 2008: 63(1-6), 2009: 64(1-6), 2010: 65(1-6), 2011: 66(1-6), 2012: 67(1-6), 2013: 68(1-6), 2014: 69(1-6), 2015: 70(1-6), 2016: 71(1-6), 2017: 72(1-6), 2018: 73(1-6), 2019: 74(1-6), 2020: 75(1-6), 2021: 76(1-6), 2022: 77(1-6), 2023: 78(1-6), 2024: 79(1-6), 2025: 80(1-6), 2026: 81(1)
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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 : 61 (1-6); 62 (1-6)
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