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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1; 2 (2 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 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1, 2, 3‐4, 5‐6); 15 (1‐2, 3, 4); 16 (1‐2, 3‐4); 17 (1 to 4); 18 (1‐2, 3, 4); 19 (1‐2, 3‐4); 20 (1‐2, 3, 4); 21 (1, 2, 3‐4); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1, 2‐3, 4); 26 (1 to 4); 27 (1 to 4); 28 (s4, 1 to 4); 29 (s2, 1, 2_suppl, 3‐4); 30 (1 to 4); 31 (s4, 1 to 3, 4_suppl); 32 (s4, 1 to 3, 4_suppl); 33 (1 to 4); 34 (1 to 4); 35 (s4, 1 to 3, 4_suppl); 36 (s1, 1_suppl, 2 to 4); 37 (s1, 1_suppl, 2 to 4); 38 (1 to 4); 39 (s1, 1 to 4); 40 (1 to 4); 41 (s1, 1_suppl, 2 to 4); 42 (s1, 1 to 3, 4); 43 (s1, 1_suppl, 2 to 4); 44 (S1, 1_suppl, 2 to 4); 45 (S1, 1_suppl, 2 to 4); 46 (1_suppl, 2 to 4); 47 (1 to 3, 4); 48 (1_suppl, 2 to 4); 50 (S2, 4); 51 (S1, 1 to 3); 52 (S1, 1 to 4); 53 (S1, 1 to 3)
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Internet Archive
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Preserved
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2025-08-08
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7 to 40
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CLOCKSS Archive
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Preserved
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2026-03-30
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21 to 54
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Portico
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Preserved
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2026-04-02
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Preserved : 1993: 21(1-4), 1994: 22(1-4), 1995: 23(1-4), 1996: 24(1-4), 1997: 25(1-4), 1998: 26(1-4), 1999: 27(1-4), 2000: 28(1-4), 2001: 29(1-2, S 2, 3-4), 2002: 30(1-4), 2003: 31(1-4, S 4), 2004: 32(1-4, S 4), 2005: 33(1-4), 2006: 34(1-4), 2007: 35(1-2, S 2, 3-4, S 4), 2008: 36(1, S 1, 2-3, S 3, 4), 2009: 37(1, S 1, 2, S 2, 3-4), 2010: 38(1-4), 2011: 39(1, S 1, 2-4), 2012: 40(1-4), 2013: 41(1, S 1, 2, S 2, 3-4), 2014: 42(1, S 1, 2, S 2, 3-4), 2015: 43(1, S 1, 2, S 2, 3, S 3, 4), 2016: 44(1, S 1, 2-4), 2017: 45(1, S 1, 2, S 2, 3-4), 2018: 46(1, S 1, 2-4), 2019: 47(1-2, S 2, 3-4, S 4), 2020: 48(1, S 1, 2-4, S 4), 2021: 49(1-4), 2022: 50(1, S 1, 2, S 2, 3-4), 2023: 51(1, S 1, 2, S 2, 3-4), 2024: 52(1, S 1, 2-4), 2025: 53(1, S 1, 2-4), 2026: 54(1)
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Portico
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Preserved
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2026-04-02
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Preserved : 1973: 1(1), 1974: 2(1-4), 1975: 3(1-4), 1976: 4(1-4), 1977: 5(1-4), 1978: 6(1-4), 1979: 7(1-4), 1980: 8(1-6), 1981: 9(1-6), 1982: 10(1-6), 1983: 11(1-6), 1984: 12(1-6), 1985: 13(1-6), 1986: 14(1-6), 1987: 15(1-4), 1988: 16(1-4), 1989: 17(1-4), 1990: 18(1-4), 1991: 19(1-4), 1992: 20(1-4), 1993: 21(1-4), 1994: 22(1-4), 1995: 23(1-4), 1996: 24(1-4), 1997: 25(1-4), 1998: 26(1-4), 1999: 27(1-4), 2000: 28(1-4), 2001: 29(1-2), 2002: 30(1-4), 2003: 31(1-4), 2004: 32(1-4), 2005: 33(1-4), 2006: 34(1-4), 2007: 35(1-4), 2008: 36(1-4), 2009: 37(1-4), 2010: 38(1-4), 2011: 39(1-4), 2012: 40(1-4), 2013: 41(1-2, S 2, 3-4), 2014: 42(1, S 1, 2, S 2, 3-4), 2015: 43(1, S 1, 2, S 2, 3, S 3, 4)
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CLOCKSS Archive
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Preserved
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2026-03-30
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12, 19 to 43
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Portico
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Preserved
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2026-04-02
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Preserved : 1993: 21(1-4), 1994: 22(1-4), 1995: 23(1-4), 1996: 24(1-4), 1997: 25(1-4), 1998: 26(1-4), 1999: 27(1-4), 2000/2001: 28(1-4, 4, S), 2001: 29(2, 2, S, 3-4), 2002: 30(1-4), 2003: 31(1-4, 4, S), 2004: 32(1-4, 4, S), 2005: 33(1-4), 2006: 34(1-4), 2007: 35(1-2, 2, S, 3-4, 4, S), 2008: 36(1, 1, S, 2-3, 3, S, 4), 2009: 37(1, 1, S, 2, 2, S, 3-4), 2010: 38(1-4), 2011: 39(1, 1, S, 2-4), 2012: 40(1-4), 2013: 41(1, 1, S, 2, 2, S, 3-4), 2014: 42(1, 1, S, 2, 2, S, 3-4), 2015: 43(1, 1, S, 2, 2, S, 3, 3, S, 4), 2016: 44(1, 1, S, 2-4), 2017: 45(1, 1, S, 2, 2, S, 3-4), 2018: 46(1, 1, S, 2-4), 2019: 47(1-2, 2, S, 3-4, 4, S), 2020: 48(1, 1, S, 2-4, 4, S)
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LOCKSS Archive
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In Progress
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2026-03-30
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28 to 30, 36
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CLOCKSS Archive
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In Progress
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2026-03-30
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21 to 35, 37, 38, 41, 44 to 48
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LOCKSS Archive
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Preserved
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2026-03-30
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21 to 27, 31 to 35, 37 to 48
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CLOCKSS Archive
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Preserved
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2026-03-30
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36, 39, 40, 42, 43
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Library of Congress
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Preserved
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2025-04-07
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38 (1 to 4); 39 (1_suppl, 1 to 4); 40 (1 to 4); 41 (2_suppl, 1_suppl, 1 to 3); 42 (2_suppl, 1_suppl, 4); 43 (1_suppl, 2_suppl, 3_suppl, 2, 3); 44 (1_suppl, 1 to 4); 45 (1_suppl, 2_suppl, 1 to 4); 46 (1_suppl, 1 to 4); 47 (2_suppl, 4_suppl, 1 to 4); 48 (1_suppl, 4_suppl, 1 to 4); 49 (1 to 4); 50 (S2, S1, 1 to 4); 51 (S1, S2, 1 to 4); 52 (S1, 1, 2)
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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 : 21 (1, 2, 3-4); 22 (1-4); 23 (1-4); 24 (1-4); 25 (1, 2-3, 4); 26 (1-4); 27 (1-4); 28 (1-4); 29 (2, 3-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (s2, 1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1-3); 52 (2); 130 (5)
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British Library
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Preserved
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2019-09-18
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Preserved : 43 (1 to 4), 44 (1 to 4), 45 (1; 3 to 4), 46 (1 to 3)
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