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Portico
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Preserved
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2026-04-09
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Preserved : 1973: 1(1-3), 1974: 2(1-3), 1975: 3(1-3), 1976: 4(1-3), 1977: 5(1-3), 1978: 6(1-3), 1979: 7(1-3), 1980: 8(1-4), 1981: 9(1-4), 1982: 10(1-4), 1983: 11(1-2, S2, 3-4), 1984: 12(1-4)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 21; 28 (1 to 4); 29 (1 to 6); 30 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (s1, 1 to 6); 34 (s1, 1 to 9); 35 (1 to 9); 36 (s2, 1 to 9); 37 (s1, 1 to 9); 38 (s2, 1 to 9); 39 (s1, 1 to 9); 40 (S1, 1 to 9); 41 (S1, 1 to 9); 42 (S1, 1 to 9); 43 (S1, 1 to 9); 44 (S1, 1 to 9); 45 (S1, 1 to 9); 46 (S1, 1 to 9); 47 (S1, 1 to 9); 48 (1 to 9); 49 (1 to 9); 50 (1 to 9); 51 (1 to 9); 52 (1 to 9); 53 (S1, 1 to 9); 54 (S1, 1, 2)
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Portico
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Preserved
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2026-04-09
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Preserved : 1993: 21(3)
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CLOCKSS Archive
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Preserved
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2026-04-06
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21, 28 to 54
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Portico
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Preserved
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2026-04-09
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Preserved : 2010: 38(1-9), 2011: 39(1-9), 2012: 40(1, S1, 2-9), 2013: 41(1, S1, 2-9), 2014: 42(1, S1, 2-9), 2015: 43(1, S1, 2-9), 2016: 44(1, S1, 2-9), 2017: 45(1, S1, 2-9), 2018: 46(1, S1, 2-9), 2019: 47(1, S1, 2-9), 2020: 48(1-9), 2021: 49(1-9), 2022: 50(1-9), 2023: 51(1-9), 2024: 52(1-9), 2025: 53(1, S1, 2-9), 2026: 54(1, S1)
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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 : 34 (s1, 1-9); 35 (s1, 1-9)
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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 : 3 (1 to 6); 4 (, 1 to 9); 5 (1 to 9); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (, 1 to 6); 34 (, 1 to 9); 35 (, 1 to 9); 36 (, 1 to 9); 37 (, 1 to 9); 38 (, 1 to 9); 39 (, 1 to 9); 41 (, 1 to 9); 42 (, 1 to 9); 43 (, 1 to 9); 44 (, 1 to 9); 45 (, 1 to 9); 46 (S1, 1 to 9); 47 (S1, 1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 6, 8, 9); 53 (S1, 1 to 6)
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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 : 3 (1 to 6); 4 (, 1 to 9); 5 (1 to 9); 28 (1 to 6); 29 (1 to 6); 31 (1 to 6); 32 (1 to 6); 33 (, 1 to 6); 34 (, 1 to 9); 35 (, 1 to 9); 36 (, 1 to 9); 37 (, 1 to 9); 38 (, 1 to 9); 39 (, 1 to 9); 41 (, 1 to 9); 42 (, 1 to 9); 43 (, 1 to 9); 44 (, 1 to 9); 45 (, 1 to 9); 46 (S1, 1 to 9); 47 (S1, 1 to 9); 48 (1 to 9); 49 (1 to 9); 51 (1 to 9); 52 (1 to 6, 8, 9); 53 (S1, 1 to 7)
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