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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1 to 4); 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, 3, 4); 34 (, 1 to 4); 35 (, 1 to 4); 36 (, 1 to 6); 37 (, 1 to 6); 38 (, 1 to 6); 39 (, 1 to 6); 40 (, 1 to 6); 41 (, 1 to 8); 42 (, 1 to 8); 43 (, 1 to 8); 44 (, 1 to 8); 45 (, 1 to 10); 46 (, 1 to 10); 47 (, 1 to 10); 48 (, 1 to 10); 49 (, 1, 2, 6 to 10); 50 (, 1 to 10); 51 (, 1 to 10); 52 (, 1 to 10); 53 (, 1 to 10); 54 (, 1 to 10); 55 (, 1 to 10); 56 (, 1 to 10); 57 (, 1 to 12); 58 (, 1 to 7, 9 to 12); 59 (, 1 to 12); 60 (, 1 to 12); 61 (, 1 to 12); 62 (, 1 to 7); 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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1 to 51
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Portico
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Preserved
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2026-02-12
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Preserved : 1964: 1(1-4), 1965: 2(1-4), 1966: 3(1-4), 1967: 4(1-4), 1968: 5(1-4), 1969: 6(1-4), 1970: 7(1-4), 1971: 8(1-4), 1972: 9(1-4), 1973: 10(1-4), 1974: 11(1-4), 1975: 12(1-4), 1976: 13(1-4), 1977: 14(1-4), 1978: 15(1-4), 1979: 16(1-4), 1980: 17(1-4), 1981: 18(1-4), 1982: 19(1-4), 1983: 20(1-4), 1984: 21(1-4), 1985: 22(1-4), 1986: 23(1-4), 1987: 24(1-4), 1988: 25(1-4), 1989: 26(1-4), 1990: 27(1-4), 1991: 28(1-4), 1992: 29(1-4), 1993: 30(1-4), 1994: 31(1-4), 1995: 32(1-4), 1996: 33(1-4), 1997: 34(1-4), 1998: 35(1-4), 1999: 36(1-6), 2000: 37(1-6), 2001: 38(1-6), 2002: 39(1-6), 2003: 40(1-6), 2004: 41(1-8), 2005: 42(1-8), 2006: 43(1-8), 2007: 44(1-8), 2008: 45(1-10), 2009: 46(1-10), 2010: 47(1-10), 2011: 48(1-10), 2012: 49(1-10), 2013: 50(1-10), 2014: 51(1-10), 2015: 52(1-10), 2016: 53(1-10), 2017: 54(1-10), 2018: 55(1-10), 2019: 56(1-10), 2020: 57(1-12), 2021: 58(1-12), 2022: 59(1-12), 2023: 60(1-12), 2024: 61(1-12), 2025: 62(1-12), 2026: 63(1-3)
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CLOCKSS Archive
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Preserved
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2026-02-09
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28 to 63
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.34:1-4;vol.35:1-4;vol.36:1-6;vol.37:1-6;vol.38:1-6;vol.39:1-6;vol.40:1-6;vol.41:1-8;vol.42:1-8;vol.43:1-8;vol.44:1-8;vol.45:1-10;vol.46:1-10;vol.47:1-10;vol.48:1-10;vol.49:1-10;vol.50:1-10;vol.51:1-10;vol.52:1-10;vol.53:1-10;vol.54:1-10;vol.55:1-10;vol.56:1-10;vol.57:1-12;vol.58:1-2
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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 : 4 (1 to 6); 5 (1 to 9); 6 (1 to 5, 7 to 9, 11, 12); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 9); 46 (1 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 9); 55 (1 to 9); 56 (1 to 9); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 5, 7 to 9, 11, 12); 62 (1 to 9)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 4 (1 to 6); 5 (1 to 9); 6 (1 to 5, 7 to 9, 11, 12); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 8); 42 (1 to 8); 43 (1 to 8); 44 (1 to 8); 45 (1 to 9); 46 (1 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (1 to 9); 54 (1 to 9); 55 (1 to 9); 56 (1 to 9); 57 (1 to 9, 11, 12); 58 (1 to 9, 11, 12); 59 (1 to 9, 11, 12); 61 (1 to 5, 7 to 9, 11, 12); 62 (1 to 9, 11)
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