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Internet Archive
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Preserved
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2025-08-08
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to 52
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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 4); 2 (5 to 8); 3 (9 to 12); 4 (13 to 17); 5 (1 to 4); 6 (1, 2, 3‐4); 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 4); 14 (1 to 4); 15 (1 to 4); 16 (1 to 4); 17 (1 to 4); 18 (1 to 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 (S1, 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); 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)
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CLOCKSS Archive
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Preserved
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2026-04-06
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25, 32, 34 to 69
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Portico
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Preserved
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2026-04-09
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Preserved : 1950/1952/1953/1954: 1(1-4), 1955/1956: 2(5-8), 1957/1958: 3(9-12), 1959/1960: 4(13-17), 1961: 5(1-4), 1962: 6(1-4), 1963: 7(1-4), 1964: 8(1-4), 1965: 9(1-4), 1966: 10(1-4), 1967: 11(1-4), 1968: 12(1-4), 1969: 13(1-4), 1970: 14(1-4), 1971: 15(1-4), 1972: 16(1-4), 1973: 17(1-4), 1974: 18(1-4), 1975: 19(1-4), 1976: 20(1-4), 1977: 21(1-4), 1978: 22(1-4), 1979: 23(1-4), 1980: 24(1-4), 1981: 25(1, S 1, 2-4), 1982: 26(1-4), 1983: 27(1-4), 1984: 28(1-4), 1985: 29(1-4), 1986: 30(1-4), 1987: 31(1-4), 1988: 32(1-4), 1989: 33(1-4), 1990: 34(1-4), 1991: 35(1-4), 1992: 36(1-4), 1993: 37(1-4), 1994: 38(1-4), 1995: 39(1-4), 1996: 40(1-4), 1997: 41(1-4), 1998: 42(1-2), 1999: 43(1-2), 2000: 44(1-2), 2001: 45(1-2), 2002: 46(1-2), 2003: 47(1-2), 2004: 48(1-2), 2005: 49(1-2), 2006: 50(1-4), 2007: 51(1-4), 2008: 52(1-4), 2009: 53(1-4), 2010: 54(1-4), 2011: 55(1-4), 2012: 56(1-4), 2013: 57(1-4), 2014: 58(1-4), 2015: 59(1-4), 2016: 60(1-4), 2017: 61(1-4), 2018: 62(1-4), 2019: 63(1-4), 2020: 64(1-4), 2021: 65(1-4), 2022: 66(1-4), 2023: 67(1-4), 2024: 68(1-4), 2025: 69(1, 3-4), 2026: 70(1)
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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 : 5 (1 to 4); 6 (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 3)
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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 : 5 (1 to 4); 6 (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 3)
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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 : 50 (1-4); 51 (1-4)
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