1976 - Vol. 1, no. 4 December
1977 - Vol. 2, no. 2 June ; no. 3 September ; no. 4 December
1978 - Vol. 3, no. 1 March
1981 - Vol. 4, no. 1 March
1982 - Vol. 5, no. 1 April
1983 - Vol. 6, no. 1 March
1984 - Vol. 7, no. 1 March ; no. 3 September
1987 - Vol. 10, no. 1 June ; no. 2 October
1988 - Vol. 11, no. 1 February ; no. 2 August
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