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Portico
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Preserved
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2026-04-09
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Preserved : 1970: 1(1-2), 1971: 2(1-3), 1972: 3(1-3), 1973: 4(1-4), 1974: 5(1-4), 1975: 6(1-4), 1976: 7(1-4), 1977: 8(1-4), 1978: 9(1-4), 1979: 10(1-4), 1980: 11(1-4), 1981: 12(1-4), 1982: 13(1-4), 1983: 14(1-4), 1984: 15(1-4), 1985: 16(1-4), 1986: 17(1-4), 1987: 18(1-4), 1988: 19(1-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1990: 21(1-4), 1991: 22(1-4), 1992: 23(1-4), 1993: 24(1-4), 1994: 25(1-4), 1995: 26(1-4), 1996: 27(1-4), 1997: 28(1-4), 1998: 29(1-4), 1999: 30(1-4), 2000: 31(1-4), 2001: 32(1-4), 2002: 33(1-4), 2003: 34(1-4), 2004: 35(1-4), 2005: 36(1-4), 2006: 37(1-4), 2007: 38(1-4), 2008: 39(1-4), 2009: 40(1-4), 2010: 41(1-4), 2011: 42(1-4), 2012: 43(1-5), 2013: 44(1-4), 2014: 45(1-4), 2015: 46(1-4), 2016: 47(1-4), 2017: 48(1-4), 2018: 49(1-4), 2019: 50(1-4), 2020: 51(1-4), 2021: 52(2-4), 2022: 53(1-4), 2023: 54(1-3, 3, S, 4), 2024: 55(1-4), 2025: 56(1-4), 2026: 57(1-2)
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CLOCKSS Archive
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Preserved
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2026-04-06
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28 to 57
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Internet Archive
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Preserved
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2025-08-08
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1 to 45
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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 : 28 (1-4); 29 (1-4); 30 (1-4); 31 (1-4); 32 (1-4); 33 (1-4); 34 (1-4); 35 (1-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-5); 44 (2-4); 45 (1-4); 46 (1-4); 47 (1-4); 48 (1-4); 49 (1-4); 50 (1-4)
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