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Portico
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Preserved
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2026-02-12
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Preserved : 1967: 23(1-12), 1968: 24(1-12), 1969: 25(1-12), 1970: 26(1-12), 1971: 27(1-12), 1972: 28(1-12), 1973: 29(1-12), 1974: 30(1-12), 1975: 31(1-12), 1976: 32(1-12), 1977: 33(1-12), 1978: 34(1-12), 1979: 35(1-12), 1980: 36(1-12), 1981: 37(1-12), 1982: 38(1-12), 1983: 39(1-12), 1984: 40(1-12), 1985: 41(1-12), 1986: 42(1-12), 1987: 43(1-12), 1988: 44(1-12), 1989: 45(1, Index 1, S 1, 2-12), 1990: 46(1-12), 1991: 47(1-12), 1992: 48(1-12), 1993: 49(1-14), 1994: 50(1-14), 1995: 51(3-4, 6-7, 10-12, 14, )
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CLOCKSS Archive
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Preserved
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2026-02-09
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23 to 50
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Portico
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Preserved
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2026-02-12
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Preserved : 1996: 52(2, 5, 7-10, 12, )
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Internet Archive
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Preserved
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2025-08-08
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23A to 55A
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 23 (1 to 12); 24 (, 1 to 12); 25 (, 1 to 12); 26 (, 1 to 12); 27 (, 1 to 12); 28 (, 1 to 12); 29 (, 1 to 12); 30 (, 1 to 12); 31 (, 1 to 4, 5-6, 7, 8, 9-10, 11, 12); 32 (, 1 to 12); 33 (, 1, 2, 3-4, 5, 6-7, 8 to 12); 34 (, 1 to 6, 7-8, 9 to 12); 35 (, 1 to 12); 36 (, 1 to 12); 37 (, 1 to 12); 38 (, 1 to 12); 39 (, 1 to 12); 40 (, 1 to 10, 11-12); 41 (, 1-2, 3 to 12); 42 (, 1, 2-3, 4 to 12); 43 (, 1 to 12); 44 (, 1 to 12); 45 (, 1 to 12); 46 (, 1 to 12); 47 (, 1, 2, 3-4, 5 to 8, 9-10, 11, 12); 48 (, 1 to 10, 11-12); 49 (, 1 to 4, 5-6, 7 to 12, 13-14); 50 (, 1 to 7, 8-9, 10 to 14); 51 (, 1 to 14); 52 (, 1 to 14); 53 (, 1, 2); 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
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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 : 23 (1-12); 24 (1-12); 25 (1-12); 26 (1-12); 27 (1-8, 10-12); 28 (1-12); 29 (1-12); 30 (1-12); 31 (1-4, 5-6, 7, 8, 9-10, 11, 12); 32 (1-12); 33 (1, 2, 3-4, 5, 6-7, 8-12); 34 (1-6, 7-8, 9-12); 35 (1-12); 36 (1-12); 37 (1-12); 38 (1-12); 39 (1-12); 40 (1-10, 11-12); 41 (1-2, 3-12); 42 (1, 2-3, 4-12); 43 (1-12); 44 (1-12); 45 (I1, 1-12); 46 (1-12); 47 (1, 2, 3-4, 5-8, 9-10, 11, 12); 48 (1-10, 11-12); 49 (1-4, 5-6, 7-12, 13-14); 50 (1-7, 8-9, 10-14)
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