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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 (1 to 4); 3 (1 to 5); 4 (1, 2, 4 to 6, 8); 5 (1 to 8); 6 (1 to 8); 7 (1, 3 to 8); 8 (1 to 8); 9 (1 to 8); 10 (1 to 8); 11 (1 to 8); 12 (1 to 8); 13 (1 to 8); 14 (1 to 3, 5 to 7); 15 (S59, 1 to 8); 16 (2 to 8); 17 (1 to 7); 18 (1 to 8); 19 (S95, 1 to 8); 20 (S107, 1 to 10); 21 (S118, 1 to 10); 22 (S127, 1 to 10); 23 (S142, 1 to 10); 24 (S156, 1 to 10); 25 (S172, 1 to 12); 26 (S189, 1 to 12); 27 (S190, 1 to 12); 28 (S195, 1 to 12); 29 (sup201, 1 to 12); 30 (sup208, 1 to 12); 31 (sup214, 1 to 12); 32 (sup222, 1 to 12); 33 (1 to 12, 225, 226, 228, 234); 34 (1 to 12, 230, 231); 35 (1 to 12); 36 (1 to 12, 233, 234); 37 (1 to 12, 230, 235, 236, 239); 38 (1 to 12, 237, 239); 39 (1 to 12, 241); 40 (1 to 12); 41 (S243, 1 to 12); 42 (1 to 12); 43 (1 to 12); 44 (sup246, 1 to 12); 45 (S247, 1 to 6, 7-8, 9 to 12); 46 (1 to 6, 7-8, 9 to 12); 47 (sup1, 1 to 7, 8-9, 10 to 12); 48 (1 to 12); 49 (1 to 12); 50 (sup1, 1 to 12); 51 (1 to 12); 52 (1 to 5, 6-7, 8 to 12); 53 (sup1, 2 to 9, 10-11, 12); 54 (1 to 12); 55 (1 to 11); 56 (1, 3 to 12); 57 (1 to 12); 58 (1 to 12); 59 (1 to 12); 60 (1 to 12); 61 (1 to 3)
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Internet Archive
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Preserved
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2025-08-08
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16 to 43
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Portico
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Preserved
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2026-04-16
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Preserved : 1967: 2(1-4), 1968/2009: 3(1-5), 1969: 4(1-2, 4-6, 8)
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Portico
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Preserved
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2026-04-16
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Preserved : 1971: 6(1-8), 1972: 7(1, 3-8)
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Portico
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Preserved
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2026-04-16
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Preserved : 1977: 12(3-8), 1978: 13(1-8), 1979: 14(1-3, 5-7), 1980: 15(1-8), 1981: 16(2-8), 1982: 17(1-7), 1983: 18(1-8)
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Portico
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Preserved
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2026-04-16
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Preserved : 2004: 38(2), 2005: 40(7), 2006: 41(9)
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Portico
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Preserved
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2026-04-16
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Preserved : 2009: 44(6, 9, 11-12, S 246), 2010: 45(1-12, S 247), 2011: 46(1-12), 2012: 47(1, S 1, 2-12), 2013: 48(1-12), 2013/2014: 49(1-12), 2014/2015: 50(1-12)
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LOCKSS Archive
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Preserved
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2026-04-13
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1 to 7, 12 to 59
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CLOCKSS Archive
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Preserved
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2026-04-13
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ahead-of-print to 4, 6, 7, 12 to 60
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LOCKSS Archive
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In Progress
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2026-04-13
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60, 61
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Portico
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Preserved
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2026-04-16
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Preserved : 1966: 1(1-4), 1967: 2(1-4), 1968: 3(1-5), 1969: 4(1-2, 4-6, 8), 1970: 5(1-8), 1971: 6(1-8), 1972: 7(1, 3-8), 1973: 8(1-8), 1974: 9(1-8), 1975: 10(1-8), 1976: 11(1-8), 1977: 12(1-8), 1978: 13(1-8), 1979: 14(1-3, 5-7), 1980: 15(1-8, sup59), 1981: 16(2-8), 1982: 17(1-7), 1983: 18(1-8), 1984: 19(1-8, sup95), 1985: 20(1-10), 1986: 21(1-10), 1987: 22(1-10), 1988: 23(1-10), 1989: 24(1-10), 1990: 25(1-12), 1991: 26(1-12), 1992: 27(1-12), 1993: 28(1-12), 1994: 29(1-12), 1995: 30(1-12), 1996: 31(1-12), 1997: 32(1-12, sup222), 1998: 33(1-12), 1999: 34(1-12), 2000: 35(1-12), 2001: 36(1-12), 2002: 37(1-12), 2003: 38(1-12), 2004: 39(1-12), 2005: 40(1-12), 2006: 41(1-12), 2007: 42(1-12), 2007/2008: 43(1-12), 2009: 44(1-12), 2010: 45(1-6, 9-12), 2011: 46(1-6, 9-12), 2012: 47(1-12), 2013: 48(1-12), 2013/2014: 49(1-12), 2015: 50(1-12), 2016: 51(1-12), 2017: 52(1-12), 2018: 53(1-12), 2019: 54(1-12), 2020: 55(1-12), 2021: 56(1-12), 2022: 57(1-12), 2023: 58(1-12), 2024: 59(1-12), 2025: 60(1-12), 2026: 61(1-4)
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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 9, 11, 12); 5 (sup1, 1 to 9, 11, 12); 6 (1 to 5); 32 (sup222, 1 to 9, 11, 12); 33 (1 to 9, 11, 12, 225, 226, 228, 234); 34 (1 to 9, 11, 12, 23, 231); 35 (1 to 9, 11, 12); 36 (1 to 9, 11, 12, 233, 234); 37 (1 to 9, 11, 12, 23, 235, 236, 239); 38 (1 to 9, 11, 12, 237, 239); 39 (1 to 9, 11, 12, 241); 41 (sup243, 1 to 9, 11, 12); 42 (1 to 9, 11, 12); 43 (1 to 9, 11, 12); 44 (sup246, 1 to 9, 11, 12); 45 (sup247, 1 to 6, 7-8, 9, 11, 12); 46 (1 to 6, 7-8, 9, 11, 12); 47 (sup1, 1 to 7, 8-9, 11, 12); 48 (1 to 9, 11, 12); 49 (1 to 9, 11, 12); 51 (1 to 9, 11, 12); 52 (1 to 5, 6-7, 8, 9, 11, 12); 53 (sup1, 1 to 9, 12); 54 (1 to 9, 11, 12); 55 (1 to 9, 11, 12); 56 (1 to 9, 11, 12); 57 (1 to 9, 11, 12); 58 (1 to 9, 11); 59 (1 to 9, 11, 12)
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