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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 21 (1 to 3, 5, 6); 22 (, 1 to 6); 23 (, 1 to 6); 24 (, 2 to 6); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 2 to 5); 28 (, 1 to 3, 5, 6); 29 (, 1 to 6); 30 (, 2 to 4, 6); 31 (, 1 to 6); 32 (, 1 to 6); 33 (, 1 to 3, 6); 34 (, 1 to 6); 35 (, 1 to 6); 36 (, 2 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 10); 43 (, 1 to 10); 44 (, 1 to 10); 45 (, 1 to 10); 46 (, 1 to 10); 47 (, 1 to 12); 48 (, 1 to 12); 49 (, 1 to 14); 50 (, 1 to 14); 51 (, 1 to 14); 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
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Portico
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Preserved
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2026-02-12
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Preserved : 1970: 21(1-6), 1971: 22(1-6), 1972: 23(1-6), 1973: 24(1-6), 1974: 25(1-6), 1975: 26(1-6), 1976: 27(1-5), 1977: 28(1-6), 1978: 29(1-6), 1979: 30(1-6), 1980: 31(1-6), 1981: 32(1-6), 1982: 33(1-6), 1983: 34(1-6), 1984: 35(1-6), 1985: 36(1-6), 1986: 37(1-6), 1987: 38(1-6), 1988: 39(1-6), 1989: 40(1-6), 1990: 41(1-8), 1991: 42(1-10), 1992: 43(1-10), 1993: 44(1-10), 1994: 45(1-10), 1995: 46(1-10), 1996: 47(1-12), 1997: 48(1-12), 1998: 49(1-14), 1999: 50(1-14), 2000: 51(1-14)
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CLOCKSS Archive
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Preserved
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2026-02-09
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27, 28, 36, 42 to 51
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.48:1-12;vol.49:1-14;vol.50:1-14;vol.51:1-14
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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 : 5 (1 to 9, 11 to 14); 48 (1 to 9, 11, 12); 49 (1 to 9, 11 to 14); 51 (1 to 9, 11 to 14)
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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 : 5 (1 to 9, 11 to 14); 48 (1 to 9, 11, 12); 49 (1 to 9, 11 to 14); 51 (1 to 9, 11 to 14)
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