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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 46 (2, 3, 5 to 10); 47 (1 to 7, 10); 48 (1 to 4, 6 to 10); 49 (1 to 10); 50 (1 to 10); 51 (1 to 7, 8-9, 10); 52 (1 to 6, 7-8, 9, 10); 53 (s1, 1, 3 to 10)
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CLOCKSS Archive
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Preserved
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2026-04-06
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25, 38 to 53
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Portico
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Preserved
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2026-04-02
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Preserved : 1986: 33(1-10), 1987: 34(1-10), 1988: 35(1-10), 1989: 36(1-10), 1990: 37(1-10), 1991: 38(1-10), 1992: 39(1-10), 1993: 40(1-10), 1994: 41(1-10), 1995: 42(1-10), 1996: 43(1-10), 1997: 44(1‐10)
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Portico
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Preserved
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2026-04-02
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Preserved : 1963: 10(1-7), 1964: 11(1-8), 1965: 12(1-7), 1966: 13(1-8), 1967: 14(1-8), 1968: 15(1-9), 1969: 16(1-9), 1970: 17(1-10), 1971: 18(1, 3-10), 1972: 19(1-10), 1973: 20(1-10), 1974: 21(1-10), 1975: 22(1-10), 1976: 23(1-10), 1977: 24(1-10), 1978: 25(1-10), 1979: 26(1-10), 1980: 27(1-10), 1981: 28(1-10), 1982: 29(1-10), 1983: 30(1-10), 1984: 31(1-10), 1985: 32(1‐10)
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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 9); 44 (1?1); 45; 46 (2 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 7, 8?9); 52 (1 to 6, 7?8, 9); 53 (, 1 to 9)
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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 9); 44 (1?1); 45; 46 (2 to 9); 47 (1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 7, 8?9); 52 (1 to 6, 7?8, 9); 53 (, 1 to 9)
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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 : 53 (s1, 1-10)
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