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Portico
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Preserved
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2026-05-07
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Preserved : 1955: 1(1-4), 1956: 2(1-4), 1957: 3(1-4), 1958: 4(1-4), 1959: 5(1-4), 1960: 6(1-4), 1961: 7(1-3), 1962: 8(1-4), 1963: 9(1-4), 1964: 10(1-4), 1965: 11(1, 4), 1966: 12(1-2, 4), 1967: 13(1-4), 1968: 14(1-4), 1969: 15(1-4), 1970: 16(1-4), 1971: 17(1-4), 1972: 18(1-4), 1973: 19(1-4), 1974: 20(1-4), 1975: 21(1-4), 1976: 22(1-4), 1977: 23(1-4), 1978: 24(1-4), 1979: 25(1-4), 1980: 26(1-4), 1981: 27(1-3), 1981: 28(1-3), 1982: 29(1-3), 1982: 30(1-3), 1983: 31(1-3), 1983: 32(1-3), 1984: 33(1-3), 1984: 34(1-3), 1985: 35(1-3), 1985: 36(1-3), 1986: 37(1-3), 1986: 38(1), 1987: 39(1-3), 1987: 40(1-3), 1988: 41(1-3), 1988: 42(1-3), 1989: 43(1-3), 1989: 44(1-3), 1990: 45(1-3), 1990: 46(1-3), 1991: 47(1-3), 1991: 48(1-3), 1992: 49(3), 1992: 50(1), 1993: 51(1-3), 1993: 52(1-3), 1994: 53(3), 1995: 54(1-3), 1996: 55(1-3), 1996: 56(1-3), 1996: 57(1-3), 1996/1997: 58(1-3), 1997: 59(1-4, 6), 1998: 60(1-6), 1999: 61(1-6), 2000: 62(1-6), 2001: 63(1-6), 2002: 64(1-6)
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Portico
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Preserved
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2026-05-07
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Preserved : 2004: 66(2-6), 2005: 67(1-6)
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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 4); 2 (1 to 4); 3 (1-2, 3, 4); 4 (1 to 4); 5 (1 to 4); 6 (1, 2, 4); 7 (1 to 3); 8 (1, 2, 4); 9 (1 to 4); 10 (1, 3); 11 (1, 4); 12 (1, 2, 4); 13 (2 to 4); 14 (1, 2); 15 (1, 4); 16 (1, 3, 4); 17 (1-2, 4); 18 (1, 4); 19 (1); 23 (2); 24 (1); 25 (3); 27 (1, 2); 29 (1-2); 31; 34 (3); 35 (2); 37 (1-2); 40 (2); 41 (1, 3); 42 (2); 45 (1, 2); 46; 48 (1, 3); 51 (2); 52 (1); 55; 57 (2); 58 (1 to 3); 59 (1 to 4, 6); 60 (1 to 6); 61 (1, 2, 3-4, 5, 6); 62 (1, 2, 3-4, 5, 6); 63 (1, 2-3, 4 to 6); 64 (1 to 6); 65 (2, 3, 4-5, 6); 66 (1, 2, 3-4, 5, 6); 67 (1 to 6); 68 (1, 2)
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LOCKSS Archive
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In Progress
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2026-05-04
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1 to 64
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CLOCKSS Archive
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In Progress
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2026-05-04
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1 to 66
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LOCKSS Archive
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Preserved
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2026-05-04
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65, 66
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CLOCKSS Archive
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Preserved
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2026-05-04
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67
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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 : 1 (1-4); 2 (1-4); 3 (1-2, 3, 4); 4 (1-4); 5 (1-4); 6 (1, 2, 4); 7 (1-3); 8 (1, 2, 4); 9 (1-4); 10 (1, 3); 11 (1, 4); 12 (1, 2, 4); 13 (2-4); 14 (1, 2); 15 (1, 4); 16 (1, 3, 4); 17 (1-2, 4); 18 (1, 4); 19 (1); 23 (2); 24 (1); 25 (3); 27 (1, 2); 29 (1-2); 31; 34 (3); 35 (2); 37 (1-2); 40 (2); 41 (1, 3); 42 (2); 45 (1, 2); 46; 48 (1, 3); 51 (2); 52 (1); 55; 57 (2); 58 (1-3); 59 (1-4, 6); 60 (1-6); 61 (1, 2, 3-4, 5, 6); 62 (1, 2, 3-4, 5, 6); 63 (1, 2-3, 4-6); 64 (1-5); 65 (2, 3, 4-5, 6); 66 (1, 2, 3-4, 5, 6); 67 (1-6)
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