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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (2 to 6); 2 (1 to 4, 5-6); 3 (1 to 6); 4 (1 to 6); 5 (1 to 6); 6 (1 to 4, 5-6); 7 (1 to 6); 8 (1 to 6); 9 (1 to 6); 10 (1 to 6); 11 (1 to 6); 12 (1 to 6); 13 (1 to 6); 14 (1 to 6); 15 (1 to 6); 16 (1 to 6); 17 (1 to 6); 18 (1 to 6); 19 (1 to 6); 20 (sup1, 1 to 6); 21 (sup2, 1 to 6); 22 (sup4, 1 to 6); 23 (1 to 6); 24 (sup5, 1 to 6); 25 (1 to 4, 5-6); 26 (1 to 6); 27 (sup6, 1-2, 3-4, 5-6); 28 (1 to 6); 29 (1 to 6); 30 (1 to 6); 31 (sup9, 1 to 6); 32 (1 to 6); 33 (1 to 6); 34 (1 to 6); 35 (sup10, 1 to 6); 36 (1 to 6); 37 (1 to 6); 38 (1 to 6); 39 (1 to 6); 40 (1 to 6); 41 (sup11, 1 to 6); 42 (1 to 6); 43 (sup12, 1 to 6); 44 (1 to 6); 45 (sup13, 1 to 6); 46 (1 to 6); 47 (sup14, 1 to 6); 48 (sup15, 1 to 6); 49 (1, 2, 3-4, 5, 6); 50 (1 to 6); 51 (1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (sup1, 1 to 6); 58 (1 to 6); 59 (1 to 6); 60 (1 to 6); 61 (sup1, 1 to 6); 62 (sup1, 1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (sup1, 1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (sup1, 1 to 6); 70 (0 to 6); 71 (sup1, 1 to 6); 72 (1 to 6); 73 (sup1, 1 to 6); 74 (sup1, 1 to 6); 75 (sup1, 1 to 6); 76 (S1, 1 to 6); 77 (sup1, 1 to 6); 78 (sup1, 1 to 6); 79 (sup1, 1 to 6); 80 (sup1, 1-2, 3 to 6); 81 (1)
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CLOCKSS Archive
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Preserved
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2026-04-06
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ahead-of-print to 80
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LOCKSS Archive
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Preserved
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2026-04-06
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1 to 80
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LOCKSS Archive
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In Progress
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2026-04-06
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81
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Portico
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Preserved
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2026-04-09
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Preserved : 2001: 56(1-6), 2002: 57(1-6, S), 2003: 58(1-6), 2004: 59(1-6), 2005: 60(1-6), 2006: 61(1, S 1, 2-6), 2007: 62(1, S 1, 2, S 2, 3-6), 2008: 63(1-6), 2009: 64(1-6), 2010: 65(1, S 1, 2-6), 2011: 66(1-6), 2012: 67(1-6), 2013: 68(1-6), 2014: 69(1, S 1, 2, S 2, 3, S 3, 4-6), 2015: 70(1, S 1, 2-4)
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Portico
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Preserved
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2026-04-09
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Preserved : 1946: 1(1-6), 1947: 2(1-6), 1948: 3(1-6), 1949: 4(1-6), 1950: 5(1-6), 1951: 6(1-6), 1952: 7(1-6), 1953: 8(1-6), 1954: 9(1-6), 1955: 10(1-6), 1956: 11(1-6), 1957: 12(1-6), 1958: 13(1-6), 1959: 14(1-6), 1960: 15(1-6), 1961: 16(1-6), 1962: 17(1-6), 1963: 18(1-6), 1964: 19(1-6), 1965: 20(1-6), 1966: 21(1-6), 1967: 22(1-6), 1968: 23(1-6), 1969: 24(1-6), 1970: 25(1-6), 1971: 26(1-6), 1972: 27(1-sup7), 1973: 28(1-6), 1974: 29(1-6), 1975: 30(1-6), 1976: 31(1-6, sup9), 1977: 32(1-6), 1978: 33(1-6), 1979: 34(1-6), 1980: 35(1-6, sup10), 1981: 36(1-6), 1982: 37(1-6), 1983: 38(1-6), 1984: 39(1-6), 1985: 40(1-6), 1986: 41(1-6, sup11), 1987: 42(1-6), 1988: 43(1-6, sup12), 1989: 44(1-6), 1990: 45(1-6, sup13), 1991: 46(1-6), 1992: 47(1-6, sup14), 1993: 48(1-6, sup15), 1994: 49(1-6), 1995: 50(1-6), 1996: 51(1-6), 1997: 52(1-6), 1998: 53(1-6), 1999: 54(1-6), 2000: 55(1-6), 2001: 56(1-6), 2002: 57(1-6), 2003: 58(1-6), 2004: 59(1-6), 2005: 60(1-6), 2006: 61(1-6), 2007: 62(1-6), 2008: 63(1-6), 2009: 64(1-6), 2010: 65(1-6), 2011: 66(1-6), 2012: 67(1-6), 2013: 68(1-6), 2014: 69(1-6), 2015: 70(1-6), 2016: 71(1-6), 2017: 72(1-6), 2018: 73(1-6), 2019: 74(1, sup1, 1, 2-6), 2020: 75(1-6), 2021: 76(1-2, sup2, 2, 3-6), 2022: 77(1, sup1, 1, 2, sup2, 2, 3-6), 2023: 78(1, sup1, 1, 2-6), 2024: 79(1, sup1, 1, 2-6), 2025: 80(1-2, sup1, 1, 3-6), 2026: 81(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 : 72 (sup1, 1 to 6); 73 (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 : 6 (1 to 6); 7 (sup1, 1 to 6); 52 (1 to 6); 53 (1 to 6); 54 (1 to 6); 55 (1 to 6); 56 (1 to 6); 57 (sup1, 1 to 6); 58 (1 to 6); 59 (1 to 6); 61 (sup1, 1 to 6); 62 (sup1, 1 to 6); 63 (1 to 6); 64 (1 to 6); 65 (sup1, 1 to 6); 66 (1 to 6); 67 (1 to 6); 68 (1 to 6); 69 (sup1, 1 to 6); 71 (sup1, 1 to 6); 72 (sup1, 1 to 6); 73 (sup1, 1 to 6); 74 (sup1, 1 to 6); 75 (sup1, 1 to 6); 76 (S1, 1 to 6); 77 (sup1, 1 to 6); 78 (sup1, 1 to 6); 79 (sup1, 1 to 4, 6)
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