Year Volume Number
1965 46 (1-4)
1966 47 (1-3)
1967 48 (1-4)
1968 49 (1-4)
1969 50 (4,
5, 10-12)
1970 51 (1-12)
1971 52 (1-8,
10-12)
1972 53 (1-12)
1973 54 (1-12)
1974 55 (1-12)
1975 56 (1-12)
1976 57 (1-9,
11, 12)
1977 58 (1-12)
1978 59 (1-12)
1979 60 (7,
18, 32, 42, 46)
1980 61 (17,
45, 46)
1981 62 (17,
45)
1982 63 (3,
18, 45, 51)
1983 64 (18,
45, 52)
1984 65 (16,
35, 45, 52)
1985 66 (18,
46, 51)
1986 67 (16,
44)
1987 68 (41,
44, 50)
1988 69 (16,
44)
1989 70 (15,
43)
1990 71 (17,
28, 43)
1991 72 (17)