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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 3); 2 (, 1 to 4); 3 (, 1 to 4); 4 (, 1 to 4); 5 (, 1); 6 (, 1 to 4); 7 (, 1 to 4); 8 (, 1 to 4); 9 (, 1 to 6); 10 (, 1 to 4); 11 (, 1 to 6); 12 (, 1 to 6); 13 (, 1 to 6); 14 (, 1 to 6); 15 (, 1 to 6); 16 (, 1 to 6); 17 (, 1 to 4, 5-6); 18 (, 1 to 6); 19 (, 1 to 6); 20 (, 1 to 6); 21 (, 1 to 7, 9); 22 (, 1 to 6); 23 (, 1 to 6); 24 (, 1 to 6); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 1 to 6); 28 (, 1 to 6); 29 (, 1 to 6); 30 (, 1 to 6); 31 (, 1 to 6); 32 (, 1 to 6); 33 (, 1 to 6); 34 (, 1 to 6); 35 (, 1 to 6); 36 (, 1 to 6); 37 (, 1 to 6); 38 (, 1 to 6); 39 (, 1 to 4, 6); 40 (, 1 to 6); 41 (, 1 to 6); 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
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Portico
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Preserved
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2026-02-12
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Preserved : 1975: 1(1-3), 1976: 2(1-4), 1977: 3(1-4), 1978: 4(1-4), 1978: 5(1), 1979: 6(1-4), 1979: 7(1-4), 1980: 8(1-4), 1981: 9(1-6), 1982: 10(1, S 1, 2-6), 1983: 11(1-6), 1984: 12(1-6), 1985: 13(1-6), 1986: 14(1-6), 1987: 15(1-6), 1988: 16(1-6), 1989: 17(1-6), 1990: 18(1-6), 1991: 19(1-6), 1992: 20(1, S 1, 2-6), 1993: 21(1-9), 1994: 22(1-6), 1994: 23(1-6), 1995: 24(1-6), 1995: 25(1-6), 1996: 26(1-6), 1996: 27(1, S 1, 2-6), 1997: 28(1-6), 1997: 29(1-6), 1998: 30(1, S 1, 2-6), 1998: 31(1-6), 1999: 32(1-6), 1999: 33(1-6), 2000: 34(1-6), 2000: 35(1-6), 2001: 36(1-6), 2001: 37(1-6), 2002: 38(1-6), 2002: 39(1-6), 2003: 40(1-6), 2003: 41(1-6)
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CLOCKSS Archive
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Preserved
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2026-02-09
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19 to 41
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.28:1-6;vol.29:1-6;vol.30:1-6,S1;vol.31:1-6;vol.32:1-6;vol.33:1-6;vol.34:1-6;vol.35:1-6;vol.36:1-6;vol.37:1-6;vol.38:1-6;vol.39:1-6;vol.40:1-6;vol.41:1-6
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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 : 3 (S1, 1 to 6); 4 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 6)
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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 : 3 (S1, 1 to 6); 4 (1 to 6); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 41 (1 to 6)
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