Up to the index .
1997 (1 publication).
1996 (2 publications).
1995 (4 publications).
1994 (16 publications).
1993 (13 publications).
1992 (17 publications).
1991 (12 publications).
1990 (11 publications).
1989 (3 publications).
1988 (5 publications).
1987 (6 publications).
1986 (2 publications).
1985 (3 publications).
1984 (1 publication).
1983 (10 publications).
1982 (4 publications).
1981 (3 publications).
1980 (2 publications).
1979 (2 publications).
1978 (1 publication).
1977 (2 publications).
1975 (1 publication).
1974 (1 publication).
1973 (1 publication).
1972 (1 publication).
1971 (2 publications).
1970 (2 publications).
1969 (3 publications).
1968 (1 publication).