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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 42 (1 to 4); 43 (1 to 4); 44 (1, 2-3, 4); 45 (1, 2-3, 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (sup1, 1 to 4); 50 (sup1, 1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1, 2, 3-4); 54 (1 to 4); 55 (1, 2, 3-4); 56 (1-2, 3, 4); 57 (1-2, 3, 4); 58 (1, 2, 3-4); 59 (1, 2-4); 60 (1-2, 3, 4); 61 (1-4); 62 (3, 4); 63 (1 to 4); 64 (1-2, 3-4); 65 (1-2, 3-4); 66 (1-2, 3-4)
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Internet Archive
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Preserved
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2025-08-08
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5D to 57
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Portico
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Preserved
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2026-04-16
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Preserved : 1969: 18(4)
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Portico
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Preserved
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2026-04-16
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Preserved : 1974: 23(3)
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Portico
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Preserved
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2026-04-16
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Preserved : 1979: 28(1-4), 1980: 29(1-4), 1981: 30(1-4), 1982: 31(1-4), 1983: 32(1-4), 1984: 33(1-4), 1985: 34(1-4), 1986: 35(1-4), 1987: 36(1-4)
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Portico
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Preserved
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2026-04-16
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Preserved : 1988: 37(2-4), 1989: 38(1-4), 1990: 39(1-4), 1991: 40(1-4), 1992: 41(1-6), 1994: 42(1-4), 1995: 43(1-4), 1996: 44(1-4), 1997: 45(1-4), 1998: 46(1-4), 1999: 47(1-4)
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Portico
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Preserved
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2026-04-16
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Preserved : 2000: 48(3), 2001: 49(1-2, 4), 2002: 50(1, 4), 2003: 51(2, 4), 2004: 52(1-4), 2005: 53(1-4), 2006: 54(1-4), 2007: 55(1-4), 2008: 56(1-4), 2009: 57(1-4), 2010: 58(1-4), 2011: 59(1-4), 2012: 60(1-4), 2013: 61(1-4), 2015: 62(1-4), 2016: 63(1-4), 2017: 64(1-4), 2017/2018: 65(1-4), 2019: 66(1-4), 2020: 67(1-4), 2021: 68(1-4), 2021/2022: 69(1-4), 2023: 70(1-4), 2024: 71(1-4), 2025: 72(1-4)
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LOCKSS Archive
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Preserved
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2026-04-13
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48 to 63
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CLOCKSS Archive
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Preserved
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2026-04-13
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56 to 63
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Portico
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Preserved
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2026-04-16
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Preserved : 2000: 48(1-4), 2001: 49(1-4), 2002: 50(1-4), 2003: 51(1-4), 2004: 52(1-4), 2005: 53(1-4), 2006: 54(1-4), 2007: 55(1-2), 2008: 56(3-4)
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Portico
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Preserved
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2026-04-16
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Preserved : 2009: 57(3-4), 2010: 58(1-2), 2011: 59(1-4), 2012: 60(1-4), 2013: 61(1-4), 2015: 62(1-4), 2016: 63(1-4)
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Library of Congress
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Preserved
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2025-04-07
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63 (4); 65 (1-2, 3-4); 66 (1-2); 67 (3-4); 68 (1-2, 3, 4); 69 (1-2, 3-4); 70 (1-2, 3-4); 71 (1-2, 3-4)
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