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Portico
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Preserved
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2026-05-07
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Preserved : 1967/1968: 1(1-4), 1968: 2(1, Index 1, 2-4), 1969/1970: 3(1, Index 1, 2-4), 1970: 4(1, Index 1, S 1, 2-6), 1971: 5(1, Index 1, 2-6), 1972/1973: 6(1, Index 1, 2-6), 1973: 7(1, Index 1, 2-12), 1974: 8(1, Index 1, 2-12), 1975: 9(1, Index 1, 2-12), 1976: 10(1, Index 1, 2-12), 1977: 11(1, Index 1, 2-18), 1978: 12(1-2)
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Internet Archive
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Preserved
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2025-08-08
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1 to 11
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CLOCKSS Archive
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Preserved
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2026-05-04
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1 to 11
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (1 to 4); 2 (Index, 1 to 4); 3 (Index, 1 to 4); 4 (Index, 1 to 6); 5 (Index, 1 to 6); 6 (Index, 1 to 6); 7 (Index, 1 to 12); 8 (Index, 1 to 8, 9-10, 11-12); 9 (Index, 1 to 3, 4-5, 6, 7, 8-9, 10, 11-12); 10 (Index, 1, 2, 3-4, 5, 6, 7-8, 9-10, 11-12); 11 (Index, 1 to 5, 6-7, 8-9, 10, 11-13, 14-16, 17-18); 12 (1, 2)
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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 (I1, 1-4); 4 (I1, 1-6); 5 (I1, 1-6); 6 (I1, 1-6); 7 (1-12); 8 (I1, 1-8, 9-10, 11-12); 9 (1-3, 4-5, 6, 7, 8-9, 10, 11-12); 10 (I1, 1, 2, 3-4, 5, 6, 7-8, 9-10, 11-12); 11 (I1, 1-5, 6-7, 8-9, 10, 11-13, 14-16, 17-18)
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