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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 20
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Portico
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Preserved
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2026-02-12
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Preserved : 1969: 1(1-4), 1970: 2(1-4), 1971: 3(1-4), 1972: 4(1-4), 1973: 5(1-4), 1974: 6(1-6), 1975: 7(1-6), 1976: 8(1-6), 1977: 9(1-10), 1978: 10(1-10), 1979: 11(1-10), 1980: 12(1-10), 1981: 13(1-10), 1982: 14(1-10), 1983: 15(1-10), 1984: 16(1-12), 1985: 17(1-12), 1986: 18(1-12, S, ), 1987: 19(1-12), 1988: 20(1, S 1, 2, S 2, 3, S 3, 4, S 4, 5, S 5, 6-12)
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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 6); 7 (, 1 to 6); 8 (, 1 to 6); 9 (, 1 to 10); 10 (, 1 to 10); 11 (, 1 to 10); 12 (, 1 to 10); 13 (, 1 to 10); 14 (, 1 to 10); 15 (, 1 to 10); 16 (, 1 to 12); 17 (, 1 to 12); 18 (, 1 to 12); 19 (, 1 to 12); 20 (, 1 to 12); 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988
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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 : 1 (1-4); 2 (1-4); 3 (1-4); 4 (1-4); 5 (1-4); 6 (1-6); 7 (1-6); 8 (1-6); 9 (1-10); 10 (1-10); 11 (1-10); 12 (1-10); 13 (1-10); 14 (1-10); 15 (1-10); 16 (1-12); 17 (1-12); 18 (S, 1-12); 19 (1-12); 20 (S1, 1-12); 27 (11)
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