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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); 3 (3); 4 (4-5); 5 (6); 6 (7); 7 (8 to 10); 8 (11 to 13); 9 (14 to 16); 10 (17 to 19); 11 (20, 21-22); 12 (23); 13 (24); 18 (34, 35); 19 (36); 20 (37); 21 (38); 22 (39); 23 (40, 41); 24 (42, 43); 25 (44, 45); 26 (46, 47); 27 (48, 49); 28 (50, 51); 37 (1, 2); 38 (1, 2); 39 (1, 2); 40 (1, 2); 41 (1, 2); 42 (1, 2); 43 (1, 2); 44 (1, 2); 45; 46 (1, 2); 47 (1, 2); 48 (1, 2); 49 (1-2); 50 (2); 51 (1, 2); 52 (1, 2); 53 (1, 2); 54 (1, 2); 55 (1, 2); 56 (1, 2); 57 (1, 2)
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Internet Archive
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Preserved
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2025-08-08
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to 41
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Portico
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Preserved
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2026-04-09
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Preserved : 1968: 1(1)
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Portico
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Preserved
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2026-04-09
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Preserved : 1970: 3(3), 1971: 4(4-5), 1972: 5(6), 1972: 6(7), 1973: 7(8-10), 1974: 8(11-13), 1975: 9(14-16), 1976: 10(17-19), 1977: 11(20-22), 1978: 12(23), 1979: 13(24), 1980: 14(25-27), 1981: 15(28-30), 1982: 16(31), 1984: 17(32-33), 1985: 18(34-35), 1986: 19(36), 1987: 20(37), 1987: 21(38), 1988: 22(39), 1989: 23(40-41), 1990: 24(42-43), 1991: 25(44-45), 1992/1993: 26(46-47), 1994: 27(48-49), 1995: 28(50-51), 1996: 29(52-53), 1997: 30(54-55), 1998: 31(56-57), 1999: 32(58-59), 2000: 33(60-61), 2001: 34(62-63), 2002: 35(64-65), 2003: 36(66-67), 2004: 37(1-2), 2005: 38(1-2), 2006: 39(1-2), 2007: 40(1-2), 2008: 41(1-2), 2009: 42(1-2), 2010: 43(1-2), 2011: 44(1-2), 2012: 45(1-2), 2013: 46(1-2), 2014: 47(1-2), 2015: 48(1-2), 2016: 49(1-2), 2017: 50(1-2), 2018: 51(1-2), 2019: 52(1-2), 2020: 53(1-2), 2021: 54(1-2), 2022: 55(1-2), 2023: 56(1-2), 2024: 57(1-2), 2025: 58(1)
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CLOCKSS Archive
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Preserved
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2026-04-06
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1, 3 to 54
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LOCKSS Archive
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Preserved
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2026-04-06
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1, 3 to 57
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LOCKSS Archive
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In Progress
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2026-04-06
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58
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Library of Congress
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Preserved
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2025-04-07
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43 (1, 2); 44 (1, 2); 45 (1, 2); 46 (1, 2); 47 (1, 2); 48 (1, 2); 49 (1-2); 50 (1, 2); 51 (1, 2); 52 (1, 2); 53 (1, 2); 54 (1, 2); 55 (1, 2); 56 (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 : 3 (54, 55); 4 (1, 2); 5 (1, 2); 31 (56, 57); 32 (58, 59); 33 (6, 61); 34 (62, 63); 35 (64, 65); 36 (66, 67); 37 (1, 2); 38 (1, 2); 39 (1, 2); 41 (1, 2); 42 (1, 2); 43 (1, 2); 44 (1, 2); 45 (1, 2); 46 (1, 2); 47 (1, 2); 48 (1, 2); 49 (1-2); 51 (2); 52 (1, 2); 53 (1, 2); 54 (1, 2); 55 (1, 2); 56 (1, 2); 57 (1)
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