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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, 2); 2 (1, 2); 3 (1 to 3); 4 (1 to 3); 5 (1 to 3); 6 (1 to 3); 7 (1 to 3); 8 (1 to 3); 9 (1 to 3); 10 (1 to 3); 11 (1 to 3); 12 (1 to 3); 13 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 4); 27 (1 to 6); 28 (1 to 6); 29 (1, 2, 3-4, 5 to 8); 30 (1 to 3, 4-5, 6 to 10); 31 (1 to 3, 4-5, 6 to 10); 32 (1 to 3, 4-5, 6 to 10); 33 (1 to 3, 4-5, 6 to 10); 34 (1 to 4, 5-6, 7 to 12); 35 (1 to 4, 5-6, 7 to 12); 36 (1 to 4, 5-6, 7 to 13); 37 (1 to 4, 5-6, 7 to 13); 38 (1 to 4, 5-6, 7 to 13); 39 (1 to 4, 5-6, 7 to 13); 40 (1 to 4, 5-6, 7 to 13); 41 (1 to 4, 5-6, 7 to 13); 42 (1 to 4, 5-6, 7 to 13); 43 (1 to 4, 5-6, 7 to 13); 44 (1 to 4, 5-6, 7 to 13); 45 (1 to 4, 5-6, 7 to 13); 46 (1 to 4, 5-6, 7 to 13); 47 (1 to 14); 48 (1 to 16); 49 (1 to 16); 50 (1 to 16); 51 (1 to 7, 9 to 16); 52 (1 to 16); 53 (1 to 16); 54 (1 to 10, 12 to 16); 55 (1 to 16); 56 (1 to 16); 57 (1 to 16); 58 (1 to 16); 59 (1 to 16); 60 (1 to 16); 61 (2, 3, 5 to 16); 62 (1 to 16); 63 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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12 to 47
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CLOCKSS Archive
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In Progress
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2026-04-27
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1 to 44, 53 to 63
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LOCKSS Archive
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In Progress
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2026-04-27
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1 to 40, 45, 46, 62, 63
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Portico
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Preserved
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2026-04-23
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Preserved : 1964: 1(1-2), 1965: 2(1-2), 1966: 3(1-3), 1967: 4(1-3), 1968: 5(1-3), 1969: 6(1-3), 1970: 7(1-3), 1971: 8(1-3), 1972: 9(1-3), 1973: 10(1-3), 1974: 11(1-3), 1975: 12(1-3), 1976: 13(1-3), 1977: 14(1-3), 1978: 15(1-3), 1979: 16(1-3), 1980: 17(1-3), 1981: 18(1-3), 1982: 19(1-4), 1983: 20(1-4), 1984: 21(1-4), 1985: 22(1-6), 1986: 23(1-6), 1987: 24(1-6), 1988: 25(1-6), 1989: 26(1-6), 1990: 27(1-6), 1991: 28(1-6), 1992: 29(1-8), 1993: 30(1-10), 1994: 31(1-10), 1995: 32(1-10), 1996: 33(1-10), 1997: 34(1-12), 1998: 35(1-12), 1999: 36(1-13), 2000: 37(1-13), 2001: 38(1-13), 2002: 39(1-13), 2003: 40(1-13), 2004: 41(1-13), 2005: 42(1-13), 2006: 43(1-13), 2007: 44(1-13), 2008: 45(1-13), 2009: 46(1-13), 2010: 47(1-14), 2011: 48(1-16), 2012: 49(1-16), 2013: 50(1-16), 2014: 51(1-16), 2015: 52(1-16), 2016: 53(1-16), 2017: 54(1-16), 2018: 55(1-16), 2019: 56(1-16), 2020: 57(1-16), 2021: 58(1-16), 2022: 59(1-16), 2023: 60(1-16), 2024: 61(1-16), 2025: 62(1-16), 2026: 63(1-5)
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LOCKSS Archive
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Preserved
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2026-04-27
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41 to 44, 47 to 61
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CLOCKSS Archive
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Preserved
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2026-04-27
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45 to 52
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Library of Congress
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Preserved
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2025-04-07
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47 (1 to 14); 48 (1 to 16); 49 (1 to 16); 50 (1 to 16); 51 (1 to 16); 52 (1 to 16); 53 (1 to 16); 54 (1 to 16); 55 (1 to 16); 56 (1 to 16); 57 (1 to 16); 58 (1 to 16); 59 (1 to 16); 60 (1 to 16); 61 (1 to 14, 16)
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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, 2); 2 (1, 2); 3 (1-3); 4 (1-3); 5 (1-3); 6 (1-3); 7 (1-3); 8 (1-3); 9 (1-3); 10 (1-3); 11 (1-3); 12 (1-3); 13 (1-3); 14 (1-3); 15 (1-3); 16 (1-3); 17 (1-3); 18 (1-3); 19 (1-4); 20 (1-4); 21 (1-4); 22 (1-6); 23 (1-6); 24 (1-6); 25 (1-6); 26 (1-4); 27 (1-6); 28 (1-6); 29 (1, 2, 3-4, 5-8); 30 (1-3, 4-5, 6-10); 31 (1-3, 4-5, 6-10); 32 (1-3, 4-5, 6-10); 33 (1-3, 4-5, 6-10); 34 (1-4, 5-6, 7-12); 35 (1-4, 5-6, 7-12); 36 (1-4, 5-6, 7-13); 37 (1-4, 5-6, 7-13); 38 (1-4, 5-6, 7-13); 39 (1-4, 5-6, 7-13); 40 (1-4, 5-6, 7-13); 41 (1-4, 5-6, 7-13); 42 (1-4, 5-6, 7-13); 43 (1-4, 5-6, 7-13); 44 (1-4, 5-6, 7-13); 45 (1-4, 5-6, 7-13); 46 (2-4, 5-6, 7-13); 47 (1-14); 48 (1-12); 49 (1-16); 50 (1-16); 51 (1-16); 52 (1-10, 12, 14, 16); 53 (1-16); 54 (1-16); 55 (1-16); 56 (1-16); 123 (10)
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British Library
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Preserved
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2019-09-18
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Preserved : 51 (1 to 16), 52 (1 to 16), 53 (1 to 16), 54 (1 to 16), 55 (1 to 15)
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