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Portico
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Preserved
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2026-04-30
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Preserved : 1965/1966: 1(1-4, Index), 1966: 1-2, 1966: 2(1-12), 1967: 3(1-12, Index), 1968: 4(1-12), 1969: 5(1-12), 1970: 6(1-12), 1971: 7(1-12), 1972: 8(1-12), 1973: 9(1-12), 1974: 10(1-12), 1975: 11(1-12), 1976: 12(1-12), 1977: 13(1-12, Index), 1978: 14(1-12), 1979: 15(1-12, Index), 1980: 16-17, 1980: 16(1-12, Index), 1981: 17(1-12)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1-2 (Index); 1 (1 to 4); 2 (1 to 12); 3 (Index, 1 to 12); 4 (1 to 12); 5 (1 to 12); 6 (1 to 12); 7 (1 to 12); 8 (1 to 12); 9 (1 to 12); 10 (1 to 12); 11 (1 to 6, 7-8, 9 to 12); 12 (1 to 12); 13 (Index, 1, 2, 3-4, 5-6, 7 to 12); 14 (1, 2-3, 4-5, 6-7, 8-9, 10 to 12); 15 (Index, 1, 2, 3-4, 5-6, 7-8, 9-10, 11-12); 16-17 (Index, 1 to 8, 9-12); 17 (1-2, 3-4, 5-6, 7-8, 9-12)
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CLOCKSS Archive
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Preserved
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2026-04-27
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1 to 17
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Internet Archive
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Preserved
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2025-08-08
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1 to 17
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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 (1-12); 3 (1, I, 2-12); 4 (1-12); 5 (1-12); 6 (1-12); 7 (1-12); 8 (1-12); 9 (1-12); 10 (1-12); 11 (1-6, 7-8, 9-12); 12 (1-12); 13 (1, 2, 3-4, 5-6, 7-12); 14 (1, 2-3, 4-5, 6-7, 8-9, 10-12); 15 (1, I, 2, 3-4, 5-6, 7-8, 9-10, 11-12); 16 (1-8, 9-12); 16-17 (I); 17 (1-2, 3-4, 5-6, 7-8, 9-12)
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