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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 to 4); 2 (1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 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 6); 31 (1 to 6); 32 (1 to 6); 33 (s1, 1 to 6); 34 (S1, 1 to 6); 35 (1 to 6); 36 (1 to 6); 37 (s1, 1 to 6); 38 (1-2, 3 to 10, 11-12); 39 (S1, 1-2, 3 to 10, 11-12); 40 (s1, 1 to 5, 6-7, 8 to 10, 11-12); 41 (S1, 1_suppl, 2 to 12); 42 (S1, 1 to 12); 43 (S1, 1 to 12); 44 (S1, 1 to 12); 45 (O1, 1 to 12); 46 (1_suppl, 2 to 12); 47 (1_suppl, 2 to 12); 48 (1_suppl, 2 to 12); 49 (1_suppl, 2 to 12); 50 (1_suppl, 2 to 12); 51 (1_suppl, 2 to 12); 52 (1_suppl, 2 to 12); 53 (1_suppl, 2 to 12); 54 (1 to 12); 55 (1_suppl, 2 to 12); 56 (1_suppl, 2 to 12); 57 (1_suppl, 2 to 12); 58 (1_suppl, 2 to 12); 59 (1_suppl, 2 to 12); 60 (1_suppl, 2, 3)
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CLOCKSS Archive
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In Progress
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2026-04-13
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1 to 38, 40, 51 to 60
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LOCKSS Archive
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In Progress
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2026-04-13
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1 to 33, 35, 36, 60
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Portico
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Preserved
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2026-04-23
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Preserved : 1967: 1(1-4), 1968: 2(1-4), 1969: 3(1-4), 1970: 4(1-4), 1971: 5(1-4), 1972: 6(1-4), 1973: 7(1-4), 1974: 8(1-4), 1975: 9(1-4), 1976: 10(1-4), 1977: 11(1-4), 1978: 12(1-4), 1979: 13(1-4), 1980: 14(1-4), 1981: 15(1-4), 1982: 16(1-4), 1983: 17(1-4), 1984: 18(1-4), 1985: 19(1-4), 1986: 20(1-4), 1987: 21(1-4), 1988: 22(1-4), 1989: 23(1-4), 1990: 24(1-4), 1991: 25(1-4), 1992: 26(1-4), 1993: 27(1-4), 1994: 28(1-4), 1995: 29(1-4), 1996: 30(1-6), 1997: 31(1-6), 1998: 32(1-6), 1999: 33(1, 1, S, 2-6), 2000: 34(1, 1, S, 2, 2, S, 3-6), 2001: 35(1-6), 2002: 36(1-6), 2003: 37(1-6), 2004: 38(1-12), 2005: 39(1, S, 1-2, 2, S, 3-12), 2006: 40(1, S 1, 2, 2, S, 3-12), 2007: 41(1, 1, S, 2, 2, S, 3-12), 2008: 42(1, 1, S, 2, 2, S, 3, 3, S, 4, 4, S, 5-12), 2009: 43(1, S 1, 2-12), 2010: 44(1, S 1, 2-12), 2011: 45(1, 1, S, 2-12), 2012: 46(1-12), 2013: 47(1, 1, S, 2-12), 2014: 48(1-12), 2015: 49(1-12), 2016: 50(1, 1, S, 2-12), 2017: 51(1, 1, S, 2-12), 2018: 52(1, 1, S, 2-12), 2019: 53(1, 1, S, 2-12), 2020: 54(1-10, 12), 2021: 55(1, 1, S, 2, 7-12), 2022: 56(1, 1, S, 2-12), 2023: 57(1, 1, S, 2-12), 2024: 58(1, 1, S, 2-12), 2025: 59(1, 1, S, 2-12), 2026: 60(1, 1, S, 2-4)
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LOCKSS Archive
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Preserved
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2026-04-13
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34, 37 to 59
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CLOCKSS Archive
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Preserved
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2026-04-13
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39, 41 to 50
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Portico
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Preserved
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2026-04-23
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Preserved : 1978: 12(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1981: 15(3), 1982: 16(1), 1983: 17(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1988: 22(4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1989: 23(3-4), 1990: 24(2, 4), 1991: 25(4), 1992: 26(1-2, 4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1993: 1(1), 1972: 6(2)
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Portico
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Preserved
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2026-04-23
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Preserved : 1993: 27(4), 1994: 28(2, 4), 1995: 29(4), 1996: 30(3, 6)
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Portico
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Preserved
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2026-04-23
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Preserved : 1997: 31(2, 4, 6), 1998: 32(3-4), 1999: 33(1-3, 6), 2000: 34(1, S 2, 3, 6)
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Portico
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Preserved
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2026-04-23
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Preserved : 2002: 36(2)
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Portico
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Preserved
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2026-04-23
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Preserved : 2004: 38(1-2), 2004: 40(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1979/2005: 13(1-2)
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Portico
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Preserved
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2026-04-23
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Preserved : 2008: 42(S 4), 2008/2009: 43(9, 11-12), 2010: 44(1, S 1, 2-12), 2011: 45(1-3, 5-12)
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Portico
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Preserved
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2026-04-23
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Preserved : 1998: 32(2-3, 5-6), 1999: 33(s1)
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CLOCKSS Archive
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Preserved
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2026-04-13
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32 to 40
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Portico
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Preserved
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2026-04-23
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Preserved : 1997: 31(1-6), 1998: 32(1-6), 1999: 33(1-6), 2000: 34(1-6), 2001: 35(1-6), 2002: 36(1-6), 2003: 37(1-6), 2004: 38(1-12), 2005: 39(1-12), 2006: 40(1-12), 2007: 41(1-12), 2008: 42(1, Suppl 1, 2, Suppl 2, 3, Suppl 3, 4, Suppl 4, 5-12), 2009: 43(1, Suppl 1, 2-10)
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Library of Congress
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Preserved
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2025-04-07
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44 (S1, 1 to 12); 45 (1_suppl, 1 to 12); 46 (1_suppl, 1 to 12); 47 (1_suppl, 1 to 12); 48 (1_suppl, 1 to 12); 49 (1_suppl, 1 to 8); 50 (1_suppl, 1, 5, 8); 51 (1_suppl, 1 to 3, 8 to 10); 52 (1_suppl, 9); 53 (1_suppl, 5 to 12); 54 (1 to 10, 12); 55 (1_suppl, 1 to 12); 56 (1_suppl, 1 to 12); 57 (1_suppl, 1 to 12); 58 (1_suppl, 1 to 12)
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British Library
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Preserved
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2019-09-18
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Preserved : 4 (2), 48 (1 to 12), 49 (1 to 12), 50 (1 to 12), 51 (1 to 12), 52 (1 to 11)
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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 (1); 7 (4); 9 (3); 11 (1); 23 (2); 26 (3, 4); 31 (1, 2, 5); 34 (1, 6); 36 (2, 5); 37 (3, 6); 38 (9, 10, 11-12); 39 (1-2, 6, 11-12); 40 (s1, 6-7, 11-12); 42 (2_suppl, 5); 43 (S1, 11); 44 (6, 9); 45 (11); 46 (1, 3-12); 47 (1, 2, 4-12); 48 (1-9, 11, 12); 49 (1-7, 10, 12); 50 (1-12); 51 (1-12); 52 (1-6, 8-12); 53 (1-11)
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