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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 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (s4, 1 to 4); 14 (s4, 1 to 4); 15 (1 to 4); 16 (s1, 1 to 4); 17 (1 to 4); 18 (s1, 1 to 4); 19 (1 to 4); 20 (1 to 4); 21 (s1, 1 to 4); 22 (1 to 4); 23 (s1, 1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (s1, 1 to 4); 30 (1 to 4); 31 (S1, 1 to 4); 32 (S1, 1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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1 to 8
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.13:1-4,sup.s4;vol.14:1-4,sup.s4;vol.15:1-4;vol.16:1-4,sup.s1;vol.17:1-4;vol.18:1-4,sup.s1;vol.19:1-4;vol.20:1-4;vol.21:1-4,sup.s1,sup.s2;vol.22:1-4;vol.23:1-4,sup.s1;vol.24:1-4;vol.25:1-4;vol.26:1-4;vol.27:1-4;vol.28:1-4;vol.29:1-4,sup.s1;vol.30:1-4;vol.31:1-4,sup.S1;vol.32:1-4,sup.S1;vol.33:1-4;vol.34:1-4;vol.35:1-4;vol.36:1-4
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Portico
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Preserved
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2026-04-09
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Preserved : 1985: 1(1-4), 1986: 2(1-4), 1987: 3(1-4), 1988: 4(1-4), 1989: 5(1-4), 1990: 6(1-4), 1991: 7(1-4), 1992: 8(1-4), 1993: 9(1-4), 1994: 10(1-4), 1995: 11(1-4), 1996: 12(1-4), 1997: 13(1-4), 1998: 14(1-4), 1999: 15(1-4), 2000: 16(1-4), 2001: 17(1-4), 2002: 18(1-4), 2003: 19(1-4), 2004: 20(1-4), 2005: 21(1-4), 2006: 22(1-4), 2007: 23(1-4), 2008: 24(1-4), 2009: 25(1-4), 2010: 26(1-4), 2011: 27(1-4), 2012: 28(1-4), 2013: 29(1-4), 2014: 30(1-4), 2015: 31(1, S1, 2-4), 2016: 32(1, S1, 2-4), 2017: 33(1-4), 2018: 34(1-4), 2019: 35(1-4), 2020: 36(1-4), 2021: 37(1-4), 2022: 38(1-4), 2023: 39(1-4), 2024: 40(1-4), 2025: 41(1-4), 2026: 42(1)
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CLOCKSS Archive
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Preserved
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2026-04-06
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7 to 42
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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 4); 3 (1 to 4); 4 (1 to 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (1 to 4); 16 (, 1 to 4); 17 (1 to 4); 18 (, 1 to 4); 19 (1 to 4); 21 (, 1 to 4); 22 (1 to 4); 23 (, 1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (, 1 to 4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 3)
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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 4); 3 (1 to 4); 4 (1 to 4); 13 (, 1 to 4); 14 (, 1 to 4); 15 (1 to 4); 16 (, 1 to 4); 17 (1 to 4); 18 (, 1 to 4); 19 (1 to 4); 21 (, 1 to 4); 22 (1 to 4); 23 (, 1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (, 1 to 4); 31 (, 1 to 4); 32 (, 1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 3)
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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 : 22 (1-4); 23 (s1, 1-4)
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