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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 (s1, 1 to 4); 15 (1 to 4); 16 (s1, 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); 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 6); 42 (1 to 6); 43 (1 to 6); 44 (1 to 6); 45 (1 to 6); 46 (1 to 4, 05, 06); 47 (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 (S1, 1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 9); 66 (1 to 9); 67 (1 to 9); 68 (1 to 9); 69 (1 to 9); 70 (1 to 9); 71 (1 to 9); 72 (1 to 9); 73 (1 to 9); 74 (1 to 9); 75 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 62
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Portico
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Preserved
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2026-04-16
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Preserved : 1952: 1(1-4), 1953: 2(1-4), 1954: 3(1-4), 1955: 4(1-4), 1956: 5(1-4), 1957: 6(1-4), 1958: 7(1-4), 1959: 8(1-4), 1960: 9(1-4), 1961: 10(1-4), 1962: 11(1-4), 1963: 12(1-4), 1964: 13(1-4), 1965: 14(1-4), 1966: 15(1-4), 1967: 16(1-4), 1968: 17(1-4), 1969: 18(1-4), 1970: 19(1-4), 1971: 20(1-4), 1972: 21(1-4), 1973: 22(1-4), 1974: 23(1-4), 1975: 24(1-4), 1976: 25(1-4), 1977: 26(1-4), 1978: 27(1-4), 1979: 28(1-4), 1980: 29(1-4), 1981: 30(1-4), 1982: 31(1-4), 1983: 32(1-4), 1984: 33(1-4), 1985: 34(1-4), 1986: 35(1-4), 1987: 36(1-4), 1988: 37(1-4), 1989: 38(1-4), 1990: 39(1-4), 1991: 40(1-4), 1992: 41(1-6), 1993: 42(1-6), 1994: 43(1-6), 1995: 44(1-6), 1996: 45(1-6), 1997: 46(1-6), 1998: 47(1-6), 1999: 48(1-6), 2000: 49(1-6), 2001: 50(1-6), 2002: 51(1-6), 2003: 52(1-6), 2004: 53(1-6), 2005: 54(1-6), 2006: 55(1-6), 2007: 56(1-6), 2008: 57(1-6), 2009: 58(1-6), 2010: 59(1-6), 2011: 60(1-6), 2012: 61(1-6), 2013: 62(1, S1, 2-6), 2014: 63(1-6), 2015: 64(1-6), 2016: 65(1-9), 2017: 66(1-9), 2018: 67(1-9), 2019: 68(1-9), 2020: 69(1-9), 2021: 70(1-9), 2022: 71(1-9), 2023: 72(1-9), 2024: 73(1-9), 2025: 74(1-9), 2026: 75(1-2)
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CLOCKSS Archive
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Preserved
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2026-04-13
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16, 28, 33, 40 to 75
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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 : 5 (1 to 6); 6 (1 to 6); 7 (1 to 9); 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 6); 62 (, 1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 9); 66 (1 to 9); 67 (1 to 9); 68 (1 to 9); 69 (1 to 9); 71 (1 to 9); 72 (1 to 9); 73 (1 to 3, 6 to 9); 74 (1 to 4, 6 to 8)
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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 : 5 (1 to 6); 6 (1 to 6); 7 (1 to 9); 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 6); 62 (, 1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (1 to 9); 66 (1 to 9); 67 (1 to 9); 68 (1 to 9); 69 (1 to 9); 71 (1 to 9); 72 (1 to 9); 73 (1 to 3, 6 to 9); 74 (1 to 4, 6 to 8)
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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 : 55 (1-6); 56 (1-6)
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