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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 27 (2 to 5); 28 (1 to 5); 29 (1 to 5); 30 (1 to 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 6); 40 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1-2, 3, 4, 5-6); 44 (1-2, 3 to 6); 45 (1-2, 3 to 6); 46 (1-2, 3 to 6)
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CLOCKSS Archive
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Preserved
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2026-05-11
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27 to 47
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Portico
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Preserved
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2026-05-14
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Preserved : 1971: 1(1-2), 1972: 2(1-6), 1973: 3(1-6), 1974: 4(1-6), 1975: 5(1-6), 1976: 6(1-6), 1977: 7(1-6), 1978: 8(1-6), 1979: 9(1-5), 1980: 10(1-6), 1981: 11(1-6), 1982: 12(1-6), 1983: 13(1-6), 1984: 14(1, S 1, 2-5), 1985: 15(1, S 1, 2-5), 1986: 16(1-5), 1987: 17(1-5), 1988: 18(1, S 1, 2, S 2, 3-5), 1989: 19(1, S 1, 2, S 2, 3-5), 1990: 20(1, S 1, 2, S 2, 3-5), 1991: 21(1-2, S 2, 3-5), 1992: 22(1, S 1, 2-5), 1993: 23(1-3, S 3, 4-5), 1994: 24(1-3, S 3, 4-5), 1995: 25(1-5, S 5), 1996: 26(1-5), 1997: 27(1-5), 1998: 28(1-4, S 4, 5), 1999: 29(1-2, S 2, 3-5), 2000: 30(1-2, S 2, 3-5), 2001: 31(1-5), 2002: 32(1, S 1, 2, S 2, 3-5), 2003: 33(1-3, S 3, 4, S 4, 5), 2004: 34(1-5), 2005: 35(1-2, S 2, 3-5), 2006: 36(1-2, S 2, 3-5), 2007: 37(1, S 1, 2, S 2, 3-5), 2008: 38(1-5), 2009: 39(1-6), 2010: 40(1-6), 2011: 41(1-6), 2012: 42(1-6), 2013: 43(1-6), 2014: 44(1-5), 2015: 45(1-6), 2016: 46(1-6), 2017: 47(1-5)
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LOCKSS Archive
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In Progress
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2026-05-11
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42
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LOCKSS Archive
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Preserved
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2026-05-11
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43 to 47
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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 5); 4 (1 to 6); 27 (1 to 5); 28 (1 to 5); 29 (1 to 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1, 3 to 5); 44 (1, 3 to 6); 45 (1, 3 to 6); 46 (1, 3 to 6); 47 (1, 2, 4, 5)
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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 5); 4 (1 to 6); 27 (1 to 5); 28 (1 to 5); 29 (1 to 5); 31 (1 to 5); 32 (1 to 5); 33 (1 to 5); 34 (1 to 5); 35 (1 to 5); 36 (1 to 5); 37 (1 to 5); 38 (1 to 5); 39 (1 to 6); 41 (1 to 6); 42 (1 to 6); 43 (1, 3 to 5); 44 (1, 3 to 6); 45 (1, 3 to 6); 46 (1, 3 to 6); 47 (1, 2, 4, 5)
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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 : 28 (supplement-5, 5); 29 (supplement-1); 30 (5); 32 (supplement-1); 33; 34; 35; 36 (1); 38 (5); 39 (1-6); 40 (1-6); 41 (1-6); 42 (1-6); 43 (1-2, 3, 4, 5-6); 44 (1-2, 3-6); 45 (1-2, 3-6); 46 (1-2, 3-6); 47 (1, 2-3, 4, 5)
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