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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 22 (2 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 6); 41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1, 6); 45 (1 to 3, 4-5, 6); 46 (1, 2, 3-4, 5, 6); 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, 2)
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Internet Archive
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Preserved
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2025-08-08
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1 to 44
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Portico
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Preserved
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2026-04-09
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Preserved : 1970: 1(1-4), 1971: 2(1-4), 1972: 3(1-4), 1973: 4(1-4), 1974: 5(1-4), 1975: 6(1-4), 1976: 7(1-4), 1977: 8(1-4), 1978: 9(1-4), 1979: 10(1-4), 1980: 11(1-4), 1981: 12(1-4), 1982: 13(1-4), 1983: 14(1-4), 1984: 15(1-4), 1985: 16(1-4), 1986: 17(1-4), 1987: 18(1-4), 1988: 19(1-4), 1989: 20(1-4), 1990: 21(1-4), 1991: 22(1-4), 1992: 23(1-4), 1993: 24(1-4), 1994: 25(1-4), 1995: 26(1-4), 1996: 27(1-4), 1997: 28(1-4), 1998: 29(1-4), 1999: 30(1-4), 2000: 31(1-4), 2001: 32(1-4), 2002: 33(1-4), 2003: 34(1-4), 2004: 35(1-4), 2005: 36(1-4), 2006: 37(1-4), 2007: 38(1-4), 2008: 39(1-4), 2009: 40(1-6), 2010: 41(1-6), 2011: 42(1-6), 2012: 43(1-6), 2013: 44(1-6), 2014: 45(1-6), 2015: 46(1-6), 2016: 47(1-6), 2017: 48(1-6), 2018: 49(1-6), 2019: 50(1-6), 2020: 51(1-6), 2021: 52(3-6), 2022: 53(1-6), 2023: 54(1-6), 2024: 55(1-6), 2025: 56(1-6), 2026: 57(1-2)
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CLOCKSS Archive
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In Progress
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2026-04-06
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21 to 38, 47 to 57
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LOCKSS Archive
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In Progress
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2026-04-06
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21 to 34, 40, 56, 57
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LOCKSS Archive
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Preserved
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2026-04-06
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35 to 39, 41 to 55
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CLOCKSS Archive
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Preserved
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2026-04-06
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39 to 46
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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 (2); 2 (3, 4); 3 (1, 2); 6 (4); 11 (1); 13 (2-4); 14 (1-4); 15 (1-4); 16 (1-4); 17 (1-4); 18 (1-4); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-4); 23 (1-4); 24 (1-4); 25 (1-4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-3); 40 (1-6); 41 (1-6); 42 (1-4, 6); 43 (1-6); 44 (1, 2-3, 4-6); 45 (1-3, 4-5, 6); 46 (1, 2, 3-4, 5, 6); 47 (1-6); 48 (1-6); 49 (1-6); 50 (1-5)
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Library of Congress
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Preserved
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2025-04-07
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41 (1 to 6); 42 (1 to 6); 43 (1 to 6); 44 (1, 2-3, 4 to 6); 45 (1 to 4-5, 6); 46 (1 to 3-4, 5, 6); 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 5)
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British Library
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Preserved
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2019-09-18
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Preserved : 22 (1), 45 (1 to 3; 6), 46 (1 to 2; 5 to 6), 47 (1 to 6), 48 (1 to 6), 49 (1 to 5)
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