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Portico
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Preserved
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2026-05-21
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Preserved : 1962: 9(1-12), 1963: 10(1-6), 1964: 11(1-6, Index), 1965: 12(1-6), 1966/1976: 13(1-6, 6, Part 2), 1967: 14(1-6), 1968: 15(1-6, Index), 1969: 16(1-6), 1970: 17(1-6), 1971: 18(1-12), 1972: 19(1-12, Index), 1973: 20(1-12), 1974: 21(1-12), 1975: 22(1-12, Index), 1976: 23(1-12)
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CLOCKSS Archive
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Preserved
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2026-05-18
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9 to 23
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 9 (1-2, 3-4, 5-6, 7-10, 11); 10 (1-2, 3 to 6); 11 (Index, 1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (Index, 1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 12); 19 (Index, 1 to 12); 20 (1 to 12); 21 (1 to 12); 22 (Index, 1 to 12); 23 (1 to 12)
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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 : 9 (3-4, 5-6, 11-12); 10 (1-2, 4-6); 11 (I, 2, 4); 12 (1-5); 13 (1, 3, 5); 14 (3, 4, 6); 15 (1, 4); 16 (1-6); 17 (1-6); 18 (2, 3, 6-12); 19 (1-12); 20 (2, 3, 5-7, 9-12); 21 (1, 2, 4-8, 10-12); 22 (1-11); 23 (1-8, 10, 11); 27 (2)
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