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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 14); 2 (1 to 12); 3 (1 to 12); 4 (1 to 12); 5 (1 to 12); 6 (1 to 12); 7 (1 to 3); 8 (1 to 3); 9 (1 to 3); 10 (1 to 3); 11 (1 to 3); 12 (1 to 3); 13 (1 to 3); 14 (1, 2, 3-4); 15 (1 to 4); 16 (1, 2, 3-4); 17 (1, 2, 3-4); 18 (1-2, 3, 4); 19 (1 to 4); 20 (1 to 4); 21 (1 to 4); 22 (1 to 4); 23 (1 to 4); 24 (1 to 4); 25 (1 to 4); 26 (1 to 4); 27 (1 to 4); 28 (1 to 4); 29 (1 to 4); 30 (1 to 4); 31 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 40 (1 to 4); 41 (1 to 4); 42 (1-2, 3-4); 43 (1, 2, 3-4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 50 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (2 to 4); 60 (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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1 to 49
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Portico
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Preserved
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2026-04-23
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Preserved : 1965: 1(1-4, 7-11), 1966: 2(2-12), 1967: 3(1, 9-12), 1968: 4(1-2, 4), 1969: 5(1-2, 5, 8, 11), 1970: 6(1-4, 6-12), 1972: 7(1-2), 1973: 8(1-3), 1974: 9(1-3), 1975: 10(1-3), 1976: 11(2), 1977: 12(1)
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CLOCKSS Archive
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Preserved
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2026-04-13
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1 to 60
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Portico
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Preserved
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2026-04-23
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Preserved : 1980: 15(3)
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Portico
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Preserved
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2026-04-23
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Preserved : 1984: 19(4), 1985: 20(2)
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Portico
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Preserved
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2026-04-23
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Preserved : 1988: 23(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1990: 25(4), 1991: 26(4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1993: 28(1)
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Portico
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Preserved
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2026-04-23
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Preserved : 1994: 29(2, 4)
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Portico
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Preserved
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2026-04-23
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Preserved : 1996: 31(1-4), 1997/1998: 32(1-4), 1998/1999: 33(1-4), 1999/2000: 34(1-4), 2000/2001: 35(1-4), 2001/2002: 36(1-4), 2002/2003: 37(1-4), 2003/2004: 38(1-4), 2004/2005: 39(1-4), 2005/2006: 40(1-4), 2006/2007: 41(1-4), 2007: 42(1-4), 2008: 43(1-4), 2009: 44(1-4), 2010: 45(1-4), 2011: 46(1-4), 2012: 47(1-3), 2013: 48(1-4), 2014: 49(1-3), 2015: 50(1-4), 2016: 51(1-4), 2017: 52(1-4), 2018: 53(1-4), 2019: 54(1-4), 2020: 55(1-4), 2021: 56(1-4), 2022: 57(1-4), 2023: 58(1-4), 2024: 59(1-4), 2025: 60(1-4), 2026: 61(1)
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LOCKSS Archive
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In Progress
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2026-04-13
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47, 54
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LOCKSS Archive
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Preserved
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2026-04-13
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48 to 53
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Library of Congress
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Preserved
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2025-04-07
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52 (1, 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4)
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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 : 4 (1 to 4); 5 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1, 3); 43 (1 to 3); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 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 : 4 (1 to 4); 5 (1 to 4); 32 (1 to 4); 33 (1 to 4); 34 (1 to 4); 35 (1 to 4); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1, 3); 43 (1 to 3); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 4); 48 (1 to 4); 49 (1 to 4); 51 (1 to 4); 52 (1 to 4); 53 (1 to 4); 54 (1 to 4); 55 (1 to 4); 56 (1 to 4); 57 (1 to 4); 58 (1 to 4); 59 (1 to 4)
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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 : 43 (2, 3-4); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1, 3, 4); 48 (1-4); 49 (1-4); 50 (1-4); 51 (1-4); 52 (1-4); 53 (1, 3, 4); 54 (1-3)
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