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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1 to 4); 2 (, 5 to 8); 3 (, 9 to 12); 4 (, 13 to 16); 5 (, 17 to 20); 6 (, 21 to 24); 7 (, 25 to 28); 8 (, 29 to 32); 9 (, 33 to 36); 10 (, 37 to 40); 11 (, 41 to 44); 12 (, 45 to 48); 13 (, 49 to 52); 14 (, 53 to 56); 15 (, 57 to 60); 16 (, 61 to 64); 17 (, 65 to 70); 18 (, 71 to 76); 19 (, 77 to 82); 20 (, 83 to 88); 21 (, 89 to 94); 22 (, 1 to 6); 23 (, 1 to 6); 24 (, 1 to 6); 25 (, 1 to 6); 26 (, 1 to 6); 27 (, 1 to 6); 28 (, 1 to 6); 34 (, 1 to 6); 35 (, 1 to 6); 36 (, 1 to 6); 37 (, 1 to 6); 38 (, 1 to 6); 39 (, 1 to 6); 40 (, 1 to 6); 41 (, 1 to 6); 42 (, 1 to 6); 43 (, 1 to 6); 44 (, 1 to 6); 45 (, 1 to 6); 46 (, 1, 2, 3-4, 5, 6); 47 (, 1 to 6); 48 (, 1 to 6); 49 (, 1 to 8); 50 (, 1 to 8); 51 (, 2); 52 (, 5 to 8); 53 (, 1 to 4, 5-6, 7, 8); 54 (, 1 to 5, 6-7, 8); 55 (, 1-2, 3-4, 5-6, 7-8); 56 (, 1 to 6); 57 (, 1 to 6); 58 (, 1 to 6); 59 (, 1 to 6); 60 (, 1 to 6); 61 (, 1, 4 to 6); 62 (, 1 to 3, 4-6); 63 (, 1 to 4, 5-6); 64 (, 1 to 4, 5-6); 65 (, 1 to 6); 66 (, 1 to 4); 67 (, 1 to 4); 68 (, 1 to 4); 69 (, 1 to 4); 70 (, 1 to 4); 71 (, 1-2, 3-4); 72 (, 1-2, 3, 4); 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959; 1960; 1961; 1962; 1963; 1964; 1965; 1966; 1967; 1968; 1969; 1970; 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999; 2000; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023
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Internet Archive
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Preserved
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2025-08-08
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1 to 51
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LOCKSS Archive
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Preserved
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2026-02-09
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1 to 72
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 73
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Portico
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Preserved
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2026-02-12
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Preserved : 1968: 17(65-70), 1969: 18(72-76), 1970: 19(79-82), 1971: 20(85-88), 1972: 21(91-94)
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Portico
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Preserved
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2026-02-12
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Preserved : 1974: 23(1-6), 1975: 24(1-6), 1976: 25(1-6), 1977: 26(1-6), 1978: 27(1-6), 1979: 28(1-6), 1980: 29(1-6), 1981: 30(1-6), 1982: 31(1-6), 1983: 32(1-6), 1984: 33(1-6), 1985: 34(1-6), 1986: 35(1-6), 1987: 36(1-6), 1988: 37(1-6), 1989: 38(1-6), 1990: 39(1-6), 1991: 40(1-6), 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(1-8), 2001: 50(1-8), 2002: 51(1-8), 2003: 52(1-8), 2004: 53(1-8), 2005: 54(1-5, 8), 2006: 55(1-8), 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(1-6), 2014: 63(1-6), 2015: 64(1-6), 2016: 65(1-6), 2017: 66(1-4), 2018: 67(1-4), 2019: 68(1-4), 2020: 69(1-4), 2021: 70(1-4), 2022: 71(1-4), 2023: 72(1-4), 2024: 73(1-4), 2025: 74(1-4)
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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 : 5 (1 to 8); 6 (1 to 6); 7 (1 to 4); 46 (1, 2, 3-4, 5, 6); 47 (1 to 6); 48 (1 to 6); 49 (1 to 8); 51 (1 to 8); 52 (1 to 8); 53 (1 to 4, 5-6, 7, 8); 54 (1 to 5, 6-7, 8); 55 (1-2, 3-4, 5-6, 7-8); 56 (1 to 6); 57 (1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (1 to 6); 62 (1 to 3, 4-6); 63 (1 to 4, 5-6); 64 (1 to 4, 5-6); 65 (1 to 6); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (3-4); 72 (1-2, 3, 4)
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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 : 1 (1-4); 2 (5-7); 3 (9, 10, 12); 4 (14); 5 (17-20); 6 (21-24); 7 (25-28); 8 (29, 31, 32); 9 (33-36); 10 (37-40); 11 (41-44); 12 (45-48); 13 (49-52); 14 (54-56); 15 (57-59); 16 (61-64); 17 (65-70); 18 (71, 72, 74-76); 19 (77-80, 82); 20 (83-88); 21 (89-94); 22 (1, 2, 5, 6); 23 (1-4, 6); 24 (1-6); 25 (1, 2, 4-6); 26 (1-6); 27 (2-6); 28 (2-6); 29 (1-5); 30 (1, 3, 4, 6); 31 (1, 3-6); 32 (2-5); 33 (1, 2, 4-6); 34 (2-6); 35 (1-4, 6); 36 (1-3, 5); 37 (1, 3, 4, 6); 38 (1, 3, 6); 39 (1-3, 5); 40 (3, 4, 6); 41 (4-6); 42 (1, 4-6); 43 (1-4, 6); 44 (3, 4); 45 (5, 6); 46 (1, 2, 3-4, 6); 47 (1-6); 48 (2, 4); 49 (1-4, 6, 8); 50 (3-8); 51 (1-8); 52 (1, 3, 4, 7, 8); 53 (1, 2, 4); 54 (1, 2); 55 (1-2, 3-4, 5-6, 7-8); 56 (1-5); 57 (4-6)
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Library of Congress
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Preserved
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2025-04-07
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59 (1 to 6); 60 (1 to 6); 61 (1 to 6); 62 (1 to 4-6); 63 (1 to 5-6); 64 (1 to 5-6); 65 (1 to 6); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 70 (1 to 4); 71 (1-2, 3-4); 72 (1-2, 3, 4)
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