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