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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); 2 (2 to 4); 3 (1 to 4); 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 9 (1 to 4); 10 (1 to 4); 11 (1 to 4); 12 (1 to 4); 13 (1 to 3); 14 (1 to 3); 15 (1 to 3); 16 (1 to 3); 17 (1 to 3); 18 (1 to 3); 19 (1 to 3); 20 (1); 21; 22; 23 (2, 3); 24 (1 to 3); 25 (1 to 3); 26 (1 to 3); 27 (1 to 3); 28 (1 to 3); 29 (1 to 3); 30 (1 to 3); 31 (1 to 3); 32 (1 to 3); 33 (1 to 3); 34 (1 to 3); 35 (1, 2, 3-4); 36 (1, 2, 3-4); 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 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 (1 to 4); 60 (1 to 4); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 70 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77; 78 (1, 3, 4); 79 (1 to 4); 80 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1)
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Internet Archive
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Preserved
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2025-08-08
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1 to 66
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Portico
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Preserved
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2026-04-02
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Preserved : 1974: 1(1), 1975: 2(1-4), 1976/1977: 3(1-4), 1977: 4(1-4), 1979/1980: 5(1-4), 1980: 6(1-4), 1981: 7(1-4), 1982: 8(1-4), 1983: 9(1-4), 1984: 10(1-4), 1985: 11(1-4), 1986: 12(1-4), 1987: 13(1-3), 1987: 14(1-3), 1988: 15(1-3), 1988: 16(1-3), 1989: 17(1-3), 1989: 18(1-3), 1990: 19(1-3), 1990: 20(1), 1991: 21(1), 1991: 22(1), 1992: 23(1-3), 1992: 24(1-3), 1993: 25(1-3), 1993: 26(1-3), 1994: 27(1-3), 1994: 28(1-3), 1995: 29(1-3), 1995: 30(1-3), 1996: 31(1-3), 1996: 32(1-3), 1997: 33(1-3), 1997: 34(1-3), 1998: 35(1-4), 1998: 36(1-4), 1999: 37(1-4), 1999: 38(1-4), 2000: 39(1-4), 2000: 40(1-4), 2001: 41(1-4), 2001: 42(1-4), 2002: 43(1-4), 2002: 44(1-4), 2003: 45(1-4), 2003: 46(1-4), 2004: 47(1-4), 2004: 48(1-4), 2005: 49(1-4), 2005: 50(1-4), 2006: 51(1-4), 2006: 52(1-4), 2007: 53(1-4), 2007: 54(1-4), 2008: 55(1-4), 2008: 56(1-4), 2009: 57(1-4), 2009: 58(1-4), 2010: 59(1-4), 2010: 60(1-4), 2011: 61(1-4), 2011: 62(1-4), 2012: 63(1-4), 2012: 64(1-2), 2013: 65(1-4), 2013: 66(1-4), 2014: 67(1-4), 2014: 68(1-4), 2015: 69(1, 3-4), 2015: 70(1-4), 2016: 71(1-4), 2016: 72(1-4), 2017: 73(1-4), 2017: 74(2)
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CLOCKSS Archive
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Preserved
|
2026-03-30
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1 to 89
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LOCKSS Archive
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In Progress
|
2026-03-30
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39 to 54, 77
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|
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LOCKSS Archive
|
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Preserved
|
2026-03-30
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55 to 76
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Library of Congress
|
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Preserved
|
2025-04-07
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72 (2); 75 (1, 3, 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 80 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4); 87 (1)
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Scholars Portal
|
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Preserved
|
2026-03-19
|
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Preserved : 88; 89
|
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National Digital Preservation Program, China
|
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Preserved
|
2025-10-23
|
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Preserved : 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 33 (1 to 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 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 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); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4)
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|
|
National Digital Preservation Program, China
|
|
Preserved
|
2025-12-04
|
|
|
Preserved : 4 (1 to 4); 5 (1 to 4); 6 (1 to 4); 7 (1 to 4); 8 (1 to 4); 33 (1 to 3); 34 (1 to 3); 35 (1 to 3); 36 (1 to 3); 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 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); 61 (1 to 4); 62 (1 to 4); 63 (1 to 4); 64 (1 to 4); 65 (1 to 4); 66 (1 to 4); 67 (1 to 4); 68 (1 to 4); 69 (1 to 4); 71 (1 to 4); 72 (1 to 4); 73 (1 to 4); 74 (1 to 4); 75 (1 to 4); 76 (1 to 4); 77 (1 to 4); 78 (1 to 4); 79 (1 to 4); 81 (1 to 4); 82 (1 to 4); 83 (1 to 4); 84 (1 to 4); 85 (1 to 4); 86 (1 to 4)
|
|
|
National Digital Preservation Program, China
|
|
Preserved
|
2025-10-23
|
|
|
Preserved : 67 (2 to 4); 68 (1 to 4)
|
|
|
National Digital Preservation Program, China
|
|
Preserved
|
2025-12-04
|
|
|
Preserved : 67 (2 to 4); 68 (1 to 4)
|
|
|
National Library of the Netherlands
|
|
Preserved
|
2024-12-15
|
|
|
Preserved : 28 (2); 34 (1); 37; 40; 41 (3); 43 (4); 44 (1, 4); 45 (3); 46 (1-4); 47 (1-4); 48 (1-4); 49 (1-4); 50 (1-4); 51 (1-4); 52 (1-4); 53 (1-4); 54 (1-4); 55 (1-4); 56 (1-4); 57 (1-4); 58 (1-4); 59 (1-4); 60 (1-4); 61 (1-4); 62 (1-4); 63 (1, 3, 4); 64 (1-4); 65 (1-4); 66 (1-4); 67 (1-4); 68 (1-4); 69 (1-4); 70 (1-4); 71 (1-4); 72 (1-4); 73 (1-4); 74 (1-4); 75 (1-4); 76 (1-4); 77 (1-4); 78 (1-4)
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