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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, 3); 2 (1 to 3); 3 (1 to 3); 4 (1 to 3); 5 (S1, 1 to 3); 6 (S1, 1 to 3); 7 (s1, 1 to 3); 8 (S1, 1 to 3); 9 (s1, 1 to 3); 10 (s1, 1 to 3); 11 (1 to 4); 12 (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); 20 (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); 30 (1 to 4); 31 (1 to 4); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 5); 40 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 4); 44 (2 to 5); 45 (1 to 5); 46 (S1, 1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 50 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 3, 5); 56 (1, 2)
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Internet Archive
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Preserved
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2025-08-08
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12 to 44
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.27:1-4;vol.28:1-4;vol.29:1-4;vol.30:1-4;vol.31:1-4;vol.32:1-5;vol.33:1-5;vol.34:1-5;vol.35:1-5;vol.36:1-5;vol.37:1-5;vol.38:1-5;vol.39:1-5;vol.40:1-5;vol.41:1-5;vol.42:1-5;vol.43:1-5;vol.44:1-5;vol.45:1-5;vol.46:1-5,S1,S2,S3;vol.47:1-5;vol.48:1-5;vol.49:1-5;vol.50:1-5;vol.51:1
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Portico
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Preserved
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2026-04-23
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Preserved : 1970/1971: 1(1-3), 1971/1972: 2(1-3), 1972/1973: 3(1-3), 1973/1974: 4(1-3), 1974/1975: 5(1, S 1, 2-3), 1975/1976: 6(1, S 1, 2-3), 1976/1977: 7(1-3), 1977/1978: 8(1, S 1, 2-3), 1978/1979: 9(1-3), 1979/1980: 10(1-3), 1981: 11(1-4), 1982: 12(1-4), 1983: 13(1-4), 1984: 14(1-4), 1985: 15(1-4), 1986: 16(1-4), 1987: 17(1-4), 1988: 18(1-4), 1989: 19(1-4), 1990: 20(1-4), 1991: 21(1-4), 1992: 22(1-4), 1993: 23(1-4), 1994: 24(1-4), 1995: 25(1-4), 1996: 26(1-4), 1997: 27(1-4), 1998: 28(1-4), 1999: 29(1-4), 2000: 30(1-4), 2001: 31(1-4), 2002: 32(1-5), 2003: 33(1-5), 2004: 34(1-5), 2005: 35(1-5), 2006: 36(1-5), 2007: 37(1-5), 2008: 38(1-5), 2009: 39(1-5), 2010: 40(1-5), 2011: 41(1-5), 2012: 42(1-5), 2013: 43(1-5), 2014: 44(1-5), 2015: 45(1-5), 2016: 46(1, S 1, 2, S 2, 3, S 3, 4-5), 2017: 47(1-5), 2018: 48(1-5), 2019: 49(1-5), 2020: 50(1-5), 2021: 51(1-5), 2022: 52(1-5), 2023: 53(1-5), 2024: 54(1-5), 2025: 55(1-5), 2026: 56(1-2)
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CLOCKSS Archive
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Preserved
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2026-04-13
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5, 13, 21 to 56
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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 : 36 (4, 5); 37 (1-5)
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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 : 3 (1 to 4); 4 (1 to 5); 5 (1 to 5); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 31 (1 to 4); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 5); 44 (1 to 5); 45 (1 to 5); 46 (S1, 1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 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 : 3 (1 to 4); 4 (1 to 5); 5 (1 to 5); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 31 (1 to 4); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 5); 41 (1 to 5); 42 (1 to 5); 43 (1 to 5); 44 (1 to 5); 45 (1 to 5); 46 (S1, 1 to 5); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 5); 53 (1 to 5); 54 (1 to 5); 55 (1 to 5)
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