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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 6); 2 (1 to 12); 3 (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 12); 12 (1 to 12); 13 (1 to 12); 14 (1 to 12); 15 (1 to 12); 16 (1 to 12); 17 (1 to 12); 18 (1 to 12); 19 (1 to 12); 20 (1 to 12); 21 (1 to 12); 23 (1 to 6, 7-8, 9 to 12)
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Portico
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Preserved
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2026-04-02
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Preserved : 1978: 1(1-6), 1979: 2(1-12), 1980: 3(1-12), 1981: 4(1-12), 1982: 5(1-12), 1983: 6(1-12), 1984: 7(1-12), 1985: 8(1-12), 1986: 9(1-12), 1987: 10(1-12), 1988: 11(1-12), 1989: 12(1-12), 1990: 13(1-12), 1991: 14(1-12), 1992: 15(1-12), 1993: 16(1-12), 1994: 17(1-12), 1995: 18(1-12), 1996: 19(1-12), 1997: 20(1-12), 1998: 21(1-12), 1999: 22(1-12), 2000: 23(1-12)
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CLOCKSS Archive
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Preserved
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2026-03-30
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14 to 23
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.20:1-12;vol.21:1-12;vol.22:1-12;vol.23:1-6,9-12,7-8
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 2 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 6, 7?8, 9, 11, 12)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 2 (1 to 9, 11, 12); 21 (1 to 9, 11, 12); 22 (1 to 9, 11, 12); 23 (1 to 6, 7?8, 9, 11, 12)
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