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Portico
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Preserved
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2026-06-04
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Preserved : 1972: 1(1-2), 1973: 2(1-2), 1974: 3(1-2), 1975: 4(1-2), 1976: 5(1-2), 1978: 6(1-2), 1980: 7(1-2), 1982: 8(1-2), 1983: 9(1-2), 1985: 10(1-2), 1986: 11(1-2), 1990: 12(1), 1991: 13(1), 1992: 14(1), 1993: 15(1), 1998: 16(1), 2001: 17(1), 2002: 18(1), 2003: 19(1), 2004: 20(1), 2005: 21(1), 2006: 22(1), 2007: 23(1), 2008: 24(1), 2009: 25(1), 2010: 26(1), 2011: 27(1), 2012: 28(1), 2013: 29(1), 2014: 30(1), 2015: 31(1), 2016: 32(1), 2017: 33(1), 2018: 34(1-2), 2019: 35(1-2), 2020: 36(1-2), 2021: 37(1-2), 2022: 38(1-2), 2023: 39(1-2), 2024: 40(1-2), 2025: 41(1-2), 2026: 42(1)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 37 (2); 39 (1, 2); 40 (1, 2); 41 (1, 2)
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Library of Congress
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Preserved
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2025-04-07
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1 (1, 2); 2 (1, 2); 3 (1-2); 4 (1-2); 5 (1-2); 6 (1-2); 7 (1-2); 8 (1-2); 9 (1-2); 10 (1-2); 11 (1-2)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 1 (2); 2 (1, 2); 3 (1-2); 4; 5; 6; 7; 8; 9; 11; 12; 13; 14; 15; 16; 17; 18; 19; 21; 22; 23; 24; 25; 26; 27; 28; 29; 31; 32; 33; 34 (2); 35 (1, 2); 36 (1, 2); 37 (1, 2); 38 (1, 2); 39 (1)
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Library of Congress
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Preserved
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2025-04-07
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12 (1); 13 (1); 14 (1); 15 (1); 16 (1); 17 (1); 18 (1); 19 (1); 20 (1); 21 (1); 22 (1); 23 (1); 24 (1); 25 (1); 26 (1); 27 (1); 28 (1); 29 (1); 30 (1); 31 (1); 32 (1); 33 (1); 34 (1, 2); 35 (1, 2); 38 (2); 39 (1, 2); 40 (1, 2)
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