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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (none, 1 to 4); 2 (none, 1 to 4); 3 (1 to 4); 4 (1 to 4); 5 (none); 6 (1 to 4); 7 (1 to 4); 8 (none, 1 to 4); 9 (none, 1 to 4); 10 (none, 1 to 4); 11 (none, 1 to 4); 12 (none, 1 to 4); 13 (none, 1 to 4); 14 (none, 1 to 4); 15 (none, 1 to 4); 16 (none); 17; 18; 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 6); 23 (1 to 6); 24 (1 to 6); 25 (1 to 6); 26 (1 to 6); 27 (1 to 6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (1 to 4 to 6 to 9); 34 (1 to 12); 35 (1 to 12); 36 (1 to 12); 37 (1 to 7, 9 to 11); 38 (3 to 12); 39 (1 to 12); 40 (1 to 12); 41 (1 to 24); 42 (1 to 24); 43 (4 to 24); 44 (1 to 24); 45 (1 to 15, 17, 18, 21 to 24); 46 (1 to 17, 19 to 24); 47 (1 to 24); 48 (1 to 24); 49 (1 to 24); 50 (1 to 24); 51 (1 to 24); 52 (1 to 24); 53 (1 to 4, 6 to 24); 54 (1 to 24); 55 (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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1 to 43
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Portico
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Preserved
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2026-04-09
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Preserved : 1972: 1(1-4, ), 1973: 2(1-4, ), 1974: 3(1-4), 1975: 4(1-4), 1976: 5, 1977: 6(1-4), 1978: 7(1-4), 1979: 8(1-4, ), 1980: 9(1-4, ), 1981: 10(1-4, ), 1982: 11(1-4, ), 1983: 12(1-4, ), 1984: 13(1-4, ), 1985: 14(1-4, ), 1986: 15(1-4, ), 1987: 16, 1988: 17
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Portico
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Preserved
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2026-04-09
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Preserved : 1989: 18, 1990: 19(1-4), 1991: 20(1-4), 1992: 21(1-4), 1993: 22(1-6), 1994: 23(1-6), 1995: 24(1-6), 1996: 25(1-6), 1997: 26(1-6), 1998: 27(1-6), 1999: 28(1-6)
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CLOCKSS Archive
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Preserved
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2026-04-06
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25 to 48, 51
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LOCKSS Archive
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In Progress
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2026-04-06
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25 to 28, 54, 55
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LOCKSS Archive
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Preserved
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2026-04-06
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26, 29 to 53
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Portico
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Preserved
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2026-04-09
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Preserved : 2009: 38(6-12), 2010: 39(1-10, 12), 2011: 40(1-12), 2011/2012: 41(1-24), 2013: 42(1-24), 2014: 43(1-24), 2015: 44(1-24), 2016: 45(1-24), 2017: 46(1-24), 2018: 47(1-24), 2019: 48(1-24), 2020: 49(1-24), 2021: 50(1-24), 2022: 51(1-24), 2023: 52(1-24), 2024: 53(1-24), 2025: 54(1-24), 2026: 55(1-6)
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CLOCKSS Archive
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In Progress
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2026-04-06
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49, 50, 52 to 55
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : (1, 2, 6 to 9, 11 to 19, 21 to 24); 4 (1 to 9, 11, 12); 5 (1 to 9, 11 to 19, 21 to 24); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11 to 19, 21 to 24); 42 (1 to 9, 11 to 19, 21 to 24); 43 (1 to 9, 11 to 19, 21 to 24); 44 (1 to 9, 11 to 19, 21 to 24); 45 (1 to 9, 11 to 19, 21, 24); 46 (1, 2, 5 to 9, 11 to 19, 21 to 24); 47 (1 to 9, 11 to 19, 21 to 24); 48 (1 to 9, 11 to 19, 22 to 24); 49 (1 to 9, 11 to 19, 21 to 24); 51 (1 to 9, 11 to 19, 21 to 24); 52 (1 to 9, 11 to 19, 21 to 24); 53 (1 to 9, 11 to 19, 21 to 24); 54 (1 to 9, 11 to 18)
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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, 6 to 9, 11 to 19, 21 to 24); 4 (1 to 9, 11, 12); 5 (1 to 9, 11 to 19, 21 to 24); 37 (1 to 9, 11, 12); 38 (1 to 9, 11, 12); 39 (1 to 9, 11, 12); 41 (1 to 9, 11 to 19, 21 to 24); 42 (1 to 9, 11 to 19, 21 to 24); 43 (1 to 9, 11 to 19, 21 to 24); 44 (1 to 9, 11 to 19, 21 to 24); 45 (1 to 9, 11 to 19, 21, 24); 46 (1, 2, 5 to 9, 11 to 19, 21 to 24); 47 (1 to 9, 11 to 19, 21 to 24); 48 (1 to 9, 11 to 19, 22 to 24); 49 (1 to 9, 11 to 19, 21 to 24); 51 (1 to 9, 11 to 19, 21 to 24); 52 (1 to 9, 11 to 19, 21 to 24); 53 (1 to 9, 11 to 19, 21 to 24); 54 (1 to 9, 11 to 19, 21)
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