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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 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 9); 12 (1 to 9); 13 (1 to 9); 14 (1 to 9); 15 (1 to 9); 16 (1 to 9); 17 (1 to 9); 18 (1 to 9); 19 (1 to 9); 20 (1 to 9); 21 (1 to 9); 22 (1 to 6, 7-8, 9); 23 (1 to 9); 24 (1 to 9); 25 (1 to 9); 26 (1 to 9); 27 (1 to 9); 28 (1 to 9); 29 (1 to 9); 30 (1 to 9); 31 (1, 2-3, 4, 5-6, 7); 32 (1 to 9); 33 (4 to 6, 8, 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (1 to 9); 40 (1, 2, 3-4, 5-6, 7 to 9); 41 (1-2, 3, 4-5, 6, 7, 8-9); 42 (1, 2-3, 4 to 9); 43 (1 to 6); 44 (1 to 6); 45 (1 to 3, 4-6); 46 (1 to 4, 5-6)
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Internet Archive
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Preserved
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2025-08-08
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1 to 31
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.18:1-9;vol.19:1-9;vol.20:1-9;vol.21:1-9;vol.22:1-6,9,7-8;vol.23:1-9;vol.24:1-9;vol.25:1-9;vol.26:1-9;vol.27:1-9;vol.28:1-9;vol.29:1-9;vol.30:1-9;vol.31:1-1,4-4,7,2-3,5-6,8-9;vol.32:1-9;vol.33:1-9;vol.34:1-9;vol.35:1-9;vol.36:1-9;vol.37:1-9;vol.38:1-9;vol.39:1-9;vol.40:1-2,7-9,3-4,5-6;vol.41:3-3,6-7,1-2,4-5,8-9
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Portico
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Preserved
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2026-05-07
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Preserved : 1979/1980: 1(1-6), 1981: 2(1-4), 1982: 3(1-4), 1983: 4(1-4), 1984: 5(1-4), 1985: 6(1-4), 1986: 7(1-6), 1987: 8(1-6), 1988: 9(1-6), 1989: 10(1-6), 1990: 11(1-9), 1991: 12(1-9), 1992: 13(1-9), 1993: 14(1-9), 1994: 15(1-9), 1995: 16(1-9), 1996: 17(1-9), 1997: 18(1-9), 1998: 19(1-9), 1999: 20(1-9), 2000: 21(1-9), 2001: 22(1-9), 2002: 23(1-9), 2003: 24(1-9), 2004: 25(1-9), 2005: 26(1-9), 2006: 27(1-9), 2007: 28(1-9), 2008: 29(1-9), 2009: 30(1-9), 2010: 31(1-7), 2011: 32(1-9), 2012: 33(1-9), 2013: 34(1-9), 2014: 35(1-9), 2015: 36(1-9), 2016: 37(1-9), 2017: 38(1-9), 2018: 39(1-9), 2019: 40(1-9), 2020: 41(1-9), 2021: 42(1-9), 2022: 43(1-6), 2023: 44(1-6), 2024: 45(1-6), 2025: 46(1-6)
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CLOCKSS Archive
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Preserved
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2026-05-04
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12 to 46
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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); 3 (1 to 9); 4 (1, 2, 3-4, 5-6, 7 to 9); 17 (1 to 9); 18 (1 to 9); 19 (1 to 9); 21 (1 to 9); 22 (1 to 6, 7?8, 9); 23 (1 to 9); 24 (1 to 9); 25 (1 to 9); 26 (1 to 9); 27 (1 to 9); 28 (1 to 9); 29 (1 to 9); 31 (1, 2?3, 4, 5?6, 7, 8?9); 32 (1 to 9); 33 (1 to 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (1 to 9); 41 (1-2, 3, 4-5, 6, 7, 8-9); 42 (1, 2-3, 4 to 9); 43 (1 to 3, 5, 6); 44 (1, 3 to 6); 45 (1 to 3, 4-6); 46 (1, 3, 4)
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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); 3 (1 to 9); 4 (1, 2, 3-4, 5-6, 7 to 9); 17 (1 to 9); 18 (1 to 9); 19 (1 to 9); 21 (1 to 9); 22 (1 to 6, 7?8, 9); 23 (1 to 9); 24 (1 to 9); 25 (1 to 9); 26 (1 to 9); 27 (1 to 9); 28 (1 to 9); 29 (1 to 9); 31 (1, 2?3, 4, 5?6, 7, 8?9); 32 (1 to 9); 33 (1 to 9); 34 (1 to 9); 35 (1 to 9); 36 (1 to 9); 37 (1 to 9); 38 (1 to 9); 39 (1 to 9); 41 (1-2, 3, 4-5, 6, 7, 8-9); 42 (1, 2-3, 4 to 9); 43 (1 to 3, 5, 6); 44 (1, 3 to 6); 45 (1 to 3, 4-6); 46 (1, 3, 4)
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