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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); 9 (2 to 4); 10 (1-2, 3, 4); 14 (1, 2, 3-4); 15 (1-2, 3, 4); 16 (1-2, 3, 4); 18 (1-3, 4); 19 (1 to 4); 20 (2 to 4); 21 (1-2, 3, 4); 22 (1, 2-4); 23 (1-3); 24 (2 to 4); 25 (1-2); 26 (2 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1-2, 3, 4); 30 (1-2, 3-4); 31 (1-2, 4); 32 (1, 2, 4); 33 (1 to 4); 35 (1, 2-4); 36 (1, 2-3, 4); 37 (1-2, 3, 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (3-4); 45 (1, 2-3, 4); 46 (1 to 4); 47 (1 to 4); 48 (2 to 4); 49 (, 1, 2, 4); 50 (1 to 4); 51 (1 to 4); 52 (1-2, 3, 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4)
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Internet Archive
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Preserved
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2025-08-08
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9 to 39
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LOCKSS Archive
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Preserved
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2026-04-13
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1 to 16, 18 to 33, 35 to 56
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CLOCKSS Archive
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Preserved
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2026-04-13
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ahead-of-print to 16, 18 to 33, 35 to 57
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LOCKSS Archive
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In Progress
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2026-04-13
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57
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Portico
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Preserved
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2026-04-23
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Preserved : 1970: 2(1-4), 1971: 3(1-4), 1972: 4(1-4), 1973: 5(1-4), 1974: 6(1-4), 1975: 7(1-4), 1976: 8(1), 1977: 9(1-4), 1978/1981: 10(1-4), 1981: 11(1-4), 1982/1983: 12(1-4), 1983/1984: 13(1-4), 1985/1986: 14(1-2), 1986/1987: 15(3-4), 1987: 16(3-4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1988: 18(4), 1989: 19(1-4), 1989/1990: 20(2-4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1991: 21(3-4), 1992: 22(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1993: 24(2-4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1995/1996/1997: 26(1-4), 1997/1998: 27(1-4), 1998/1999: 28(1-4), 1999: 29(1-4), 2000: 30(1-4), 2001/2002: 31(1-2, 4), 2002: 32(1-2, 4), 2003: 33(1-4), 2004: 35(1-4), 2004: 36(1-4), 2005: 37(1-4), 2006: 38(1-4), 2007: 39(1-4), 2008: 40(1-4), 2009: 41(1-4), 2010: 42(1-4), 2011: 43(1-4), 2012: 44(1-4), 2013: 45(1-4), 2014: 46(1-4), 2015: 47(1-4), 2016: 48(1-4), 2017: 49(1-4), 2018: 50(1-4), 2019: 51(1-4), 2020: 52(1-4), 2021/2022: 53(1-4), 2022: 54(1-4), 2023: 55(1-4), 2024: 56(1-4), 2025: 57(1-4)
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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 : 3 (3-4); 4 (1 to 4); 5 (1 to 4); 26; 27 (1 to 4); 28 (1 to 4); 29 (1-2, 3, 4); 31 (1-2, 4); 32 (1, 2, 4); 33 (1 to 4); 35 (1, 2-4); 36 (1, 2-3, 4); 37 (1-2, 3, 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1, 2, 3-4); 45 (1, 2-3, 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1-2, 3, 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1)
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Library of Congress
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Preserved
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2025-04-07
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49 (1 to 4); 50 (1, 3, 4); 51 (1 to 4); 52 (1-2, 3, 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4)
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