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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 3 (1); 32 (, 3); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 2 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 4); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1, 2, 4); 48 (, 1 to 4); 49 (, 1 to 4); 50 (, 1 to 4); 51 (, 1 to 4); 52 (, 1 to 4); 53 (, 1, 2); 1975; 2004; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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vol.25:1-4;vol.26:1-4;vol.27:1-4;vol.28:1-4;vol.29:1-4;vol.30:1-4;vol.31:1-4;vol.32:1-4;vol.33:1-4;vol.34:1-4;vol.35:1-4;vol.36:1-4;vol.37:1-4;vol.38:1-4;vol.39:1-4;vol.40:1-4;vol.41:1-4;vol.42:1-4;vol.43:1-4;vol.44:1-4;vol.45:1-4;vol.46:1-4;vol.47:1-4;vol.48:1-4
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Portico
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Preserved
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2026-02-12
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Preserved : 1973: 1(1-2), 1974: 2(1-2), 1975: 3(1-2), 1976: 4(1), 1977: 5(1-2), 1978: 6(1-2), 1979: 7(1-2), 1980: 8(1-2), 1981: 9(1-2), 1982: 10(1-4), 1983: 11(1-4), 1984: 12(1-4), 1985: 13(1-4), 1986: 14(1-4), 1987: 15(1-4), 1988: 16(1, S 1, 2-4), 1989: 17(1-4), 1990: 18(1-4), 1991: 19(1-4), 1992: 20(1-4), 1993: 21(1-4), 1994: 22(1-4), 1995: 23(1-4), 1996: 24(1-4), 1997: 25(1-4), 1998: 26(1-4), 1999: 27(1-4), 2000: 28(1-4), 2001: 29(1-4), 2002: 30(1-4), 2003: 31(1-4), 2004: 32(1-4), 2005: 33(1-4), 2006: 34(1-4), 2007: 35(1-4), 2008: 36(1-4), 2009: 37(1-4), 2010: 38(1-4), 2011: 39(1-4), 2012: 40(1-4), 2013: 41(1-4), 2014: 42(1-4), 2015: 43(1-4), 2016: 44(1-4), 2017: 45(1-4), 2018: 46(1-4), 2019: 47(1-4), 2020: 48(1-4), 2021: 49(1-4), 2022: 50(1-4), 2023: 51(1-4), 2024: 52(1-4), 2025: 53(1-4)
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CLOCKSS Archive
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Preserved
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2026-02-09
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3, 19 to 53
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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 4); 5 (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 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1, 3, 4); 53 (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 : 3 (1 to 4); 4 (1 to 4); 5 (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 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1, 3, 4); 53 (1 to 3)
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Library of Congress
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Preserved
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2025-04-07
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3 (1); 32 (3); 44 (1 to 4); 45 (1, 3, 4); 46 (1 to 4); 47 (1, 3, 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4); 51 (3); 52 (1)
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