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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; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 24 (2); 25 (1, 2); 26 (1, 2); 27 (1, 2); 28 (1, 2); 29 (1, 2); 30 (1, 2); 31 (1, 2); 32 (1, 3); 33; 34 (1); 35 (2); 36 (1 to 3); 37 (1 to 3); 38 (1-2, 3, 4); 39 (1-2, 3, 4); 40 (1-2, 3); 41 (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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1 to 38
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Portico
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Preserved
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2026-04-16
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Preserved : 1979: 1(1), 1980: 2(1), 1981: 3(1), 1982: 4(1), 1983: 5(1), 1984: 6(1), 1985: 7(1), 1986: 8(1), 1987: 9(1), 1988: 10(1), 1989: 11(1), 1990: 12(1), 1991: 13(1), 1992: 14(1), 1993: 15(1), 1994: 16(1), 1995: 17(1), 1996: 18(1), 1997: 19(1), 1998: 20(1), 1999: 21(1), 2000: 22(1), 2001: 23(1), 2002: 24(1-2), 2003: 25(1-2), 2004: 26(1-2), 2005: 27(1-2), 2006: 28(1-2)
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Portico
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Preserved
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2026-04-16
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Preserved : 2007: 29(2), 2008: 30(1-2)
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Portico
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Preserved
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2026-04-16
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Preserved : 2009: 31(2), 2010: 32(1, 3), 2011: 33(1-2), 2012: 34(2-3), 2013: 35(1-3), 2014: 36(1-3), 2015: 37(1-3), 2016: 38(1-3), 2017: 39(1-4), 2018: 40(1-2)
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Portico
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Preserved
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2026-04-16
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Preserved : 2019: 41(1-4), 2020: 42(1-4), 2021: 43(1-4), 2022: 44(2-4), 2023: 45(1-4), 2024: 46(1-4), 2025: 47(1-4), 2026: 48(1)
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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; 3; 4; 5; 6; 7; 8; 9 (3); 10 (1); 11; 12; 13; 14; 15; 16 (3); 17 (1); 18; 19; 20; 21; 22; 23; 24 (2); 25 (1, 2); 26 (1, 2); 27 (1, 2); 28 (1, 2); 29; 30 (1, 2); 31 (1, 2); 32 (1-3); 33 (1-3)
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Library of Congress
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Preserved
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2025-04-07
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41 (3-4); 42 (1 to 3-4); 43 (1 to 3-4); 44 (2, 3-4); 45 (2, 3-4); 46 (1, 2)
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