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Portico
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Preserved
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2026-02-12
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Preserved : 1970: 1(1-4), 1970/1971: 2(1-4), 1971: 3(1-4), 1972: 4(1-4), 1972/1973: 5(1-4), 1973/1974: 6(1-4), 1974/1975: 7(1-4), 1975: 8(1-4), 1976: 9(1-4), 1976: 10(1-4), 1977: 11(1-3), 1977: 12(1-3), 1978: 13(1-3), 1978: 14(1-3), 1978: 15(1-3), 1979: 16(1-3), 1979: 17(1-3), 1980: 18(1-3), 1980: 19(1-3), 1981: 20(1-3), 1981: 21(1-3), 1982: 22(1-3), 1982: 23(1-3)
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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, 2, 3-4); 7 (, 1, 2-3, 4); 8 (, 1-2, 3, 4); 9 (, 1-2, 3, 4); 10 (, 1, 2, 3-4); 11 (, 1 to 3); 12 (, 1 to 3); 13 (, 1 to 3); 14 (, 1 to 3); 15 (, 1 to 3); 16 (, 1 to 3); 17 (, 1-2, 3); 18 (, 1 to 3); 19 (, 1-2, 3); 20 (, 1 to 3); 21 (, 1, 2-3); 22 (, 1 to 3); 23 (, 1, 2-3); 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 23
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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, 2, 3-4); 7 (1, 2-3, 4); 8 (1-2, 3, 4); 9 (1-2, 3, 4); 10 (1, 2, 3-4); 11 (1-3); 12 (1-3); 13 (1-3); 14 (1-3); 15 (1-3); 16 (1-3); 17 (1-2, 3); 18 (1-3); 19 (1-2, 3); 20 (1-3); 21 (1, 2-3); 22 (1-3); 23 (1, 2-3)
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