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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 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 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1, 2, 3-4); 47 (1-2, 3, 4); 48 (1-2, 3-4); 49 (1, 3); 50 (1-2); 51 (4); 52 (1, 3); 53 (1, 3); 54 (1 to 3); 55 (1-2, 3-4)
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Internet Archive
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Preserved
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2025-08-08
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to 39
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Portico
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Preserved
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2026-04-09
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Preserved : 1972: 2(1-4), 1973: 3(1-4), 1974: 4(1-4), 1975: 5(1-4), 1976: 6(1-4), 1977: 7(1-4), 1978: 8(1-4), 1979: 9(1-4), 1980: 10(1-4), 1981: 11(1-4), 1982: 12(1-4), 1983: 13(1-4), 1984: 14(1-4), 1985: 15(1-4), 1986: 16(1-4), 1987: 17(1-4), 1988: 18(1-4), 1989: 19(1-4), 1990: 20(1-4), 1991: 21(1-3), 1992: 22(1-4), 1993: 23(1-4), 1994: 24(1-4), 1995: 25(1-4), 1996: 26(1-4), 1997: 27(1-4), 1998: 28(1-4), 1999: 29(1-4), 2000: 30(1-4), 2001: 31(1-4), 2002: 32(1-4), 2003: 33(1-4), 2004: 34(1-4), 2005: 35(1-4), 2006: 36(1-4), 2007: 37(1-4), 2008: 38(1-4), 2009: 39(1-4), 2010: 40(1-4), 2011: 41(1-4), 2012: 42(1-4), 2013: 43(1-4), 2014: 44(1-3), 2015: 45(1-4), 2016: 46(1-4), 2017/2019: 47(1-4), 2019/2020: 48(1-4), 2020: 49(1-4), 2021: 50(1-2), 2021/2022: 51(1-4), 2022: 52(1-3), 2023: 53(1-4), 2024: 54(1-3), 2025: 55(1-4)
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LOCKSS Archive
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In Progress
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2026-04-06
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42
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LOCKSS Archive
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Preserved
|
2026-04-06
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43 to 47
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CLOCKSS Archive
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Preserved
|
2026-04-06
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1 to 55
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Portico
|
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Preserved
|
2026-04-09
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Preserved : 1970: 1(1-4)
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National Library of the Netherlands
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Preserved
|
2024-12-15
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Preserved : 31 (1-4); 32 (1-4); 33 (1-4); 34 (1, 2, 4); 35 (1-4); 36 (1-3); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-4); 45 (1-4); 46 (1, 2, 3-4); 47 (1-2, 3)
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Library of Congress
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Preserved
|
2025-04-07
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46 (1, 3-4); 47 (1-2, 3, 4); 48 (1-2, 3-4); 49 (1-2, 3-4); 50 (1-2); 51 (1-3, 4); 52 (1-2, 3-4); 53 (1-2, 3-4); 54 (1, 2)
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National Digital Preservation Program, China
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Preserved
|
2025-10-23
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Preserved : 3 (1 to 4); 4 (1 to 4); 5 (1-2); 27 (2 to 4); 28 (1 to 4); 29 (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); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1, 2, 3-4); 47 (1-2, 3, 4); 48 (1-2, 3-4); 49 (1-2, 3-4); 51 (1-3, 4); 52 (1-2, 3-4); 53 (1-2, 3-4); 54 (1 to 3)
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National Digital Preservation Program, China
|
|
Preserved
|
2025-12-04
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|
|
Preserved : 3 (1 to 4); 4 (1 to 4); 5 (1-2); 27 (2 to 4); 28 (1 to 4); 29 (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); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1, 2, 3-4); 47 (1-2, 3, 4); 48 (1-2, 3-4); 49 (1-2, 3-4); 51 (1-3, 4); 52 (1-2, 3-4); 53 (1-2, 3-4); 54 (1 to 3)
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