1978 - Vol. 1, no. 9
1979 - Vol. 1, no. 14 April ; no. 15 July ; no. 16 October
1980 - Vol. 1, no. 17 February ; Vol. 2, no. 18 June ; no. 19 December
1981 - Vol. 2, no. 20 March ; no. 21 June ; no. 22 October & December
1982 - Vol. 2, no. 23 March ; no. 24 July
1983 - Vol. 3, no. 25 June ; no. 26 December
1984 - Vol. 3, no. 27 December
1986 - Vol. 4, no. 29 December
1987 - Vol. 5, no. 30 October
1989 - July
1990 - October
1992 - December
1993 ; 1994 - September ; December
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