Year Volume Number
1959 29 (1-3)
1960 30 (1-4)
1961 31 (1-4)
1962 32 (1-4)
1964 34 (1-4)
1965 35 (1-4)
1966 36 (1-4)
1967 37 (1-4)
1968 38 (1-4)
1969 39 (1-4)
1970 40 (1-4)
1971 41 (1-4)
1972 42 (1-4)
1973 43 (1-4)
1974 44 (1-4)
1975 45 (1-4)
1976 46 (1-4)
1977 47 (1-4)
1978 48 (1-4)
1979 49 (1-4)
1980 50 (1-4)
1981 51 (1-4)
1982 52 (1-4)
1983 53 (1-4)
1984 54 (1-4)
1985 55 (1-6)
1986 56 (1, 3-6)
1987 57 (1-6)
1988 58 (1-6)
1989 59 (1-6)
1990 60 (1-4, 6)
1991 61 (1-7)
1992 62 (1-6)
1993 63 (1-5)
1994 A64 (1-4)
1994 B64 (1-4)
1995 A65 (2-4)
1995 B65 (1-4)
1996 66 (2-6)
1997 67 (1-6)
1998 68 (1-6)