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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 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 (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 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 6); 45 (1 to 6); 46 (1 to 6); 47 (s1, 1 to 6); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 6); 61 (1 to 6); 62 (1)
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Technische Informationsbibliothek
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Preserved
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2026-01-13
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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.44:1-6;vol.45:1-6;vol.46:1-6;vol.47:1-6,sup.s1,sup.s2;vol.48:1-6;vol.49:1-6;vol.50:1-6;vol.51:1-6;vol.52:1-6;vol.53:1-6;vol.54:1-6;vol.55:1-6;vol.56:1-6
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Portico
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Preserved
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2026-04-09
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Preserved : 1965: 1(1-4), 1966: 2(1-4), 1967: 3(1-4), 1968: 4(1-4), 1969: 5(1-4), 1970: 6(1-4), 1971: 7(1-4), 1972: 8(1-4), 1973: 9(1-4), 1974: 10(1-4), 1975: 11(1-4), 1976: 12(1-4), 1977: 13(1-4), 1978: 14(1-4), 1979: 15(1-4), 1980: 16(1-4), 1981: 17(1-4), 1982: 18(1-4), 1983: 19(1-4), 1984: 20(1-4), 1985: 21(1-4), 1986: 22(1-4), 1987: 23(1-4), 1988: 24(1-4), 1989: 25(1-4), 1990: 26(1-4), 1991: 27(1-4), 1992: 28(1-4), 1993: 29(1-4), 1994: 30(1-4), 1995: 31(1-4), 1996: 32(1-4), 1997: 33(1-4), 1998: 34(1-4), 1999: 35(1-4), 2000: 36(1-4), 2001: 37(1-4), 2002: 38(1-4), 2003: 39(1-4), 2004: 40(1-4), 2005: 41(1-4), 2006: 42(1-4), 2007: 43(1-4), 2008: 44(1-6), 2009: 45(1-6), 2010: 46(1-6), 2011: 47(1-6), 2012: 48(1-6), 2013: 49(1-6), 2014: 50(1-6), 2015: 51(1-6), 2016: 52(1-6), 2017: 53(1-6), 2018: 54(1-6), 2019: 55(1-6), 2020: 56(1-6), 2021: 57(1-6), 2022: 58(1-6), 2023: 59(1-6), 2024: 60(1-6), 2025: 61(1-6), 2026: 62(1)
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CLOCKSS Archive
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Preserved
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2026-04-06
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14, 27 to 62
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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 : 42 (1-4); 43 (1-4)
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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 : 4 (1 to 4); 5 (1 to 6); 6 (1 to 6); 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 6); 45 (1 to 6); 46 (1 to 6); 47 (, 1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (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 : 4 (1 to 4); 5 (1 to 6); 6 (1 to 6); 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 6); 45 (1 to 6); 46 (1 to 6); 47 (, 1 to 6); 48 (1 to 6); 49 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 5)
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Library of Congress
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Preserved
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2025-04-07
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14 (3); 48 (1 to 6); 49 (1 to 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 3, 5); 54 (1, 2, 4 to 6); 55 (3 to 6); 56 (1, 2, 4, 6); 57 (2 to 6); 58 (1 to 6); 59 (5, 6); 60 (3)
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