Bestand
1959 - 1960; 1969,1-5,9-12; 1970,1-2,4,10-12; 1971,1-5,9-10,12; 1972,1-4,7,9,11,132; 1973,1-5,9-12; 1974,3-5,7,9-12; 1975,1-6,9-12; 1976,1-2,4-5,7,9-10,12; 1977,1-5,7,9-10,12; 1978,1-3,7,9-12; 1979,1-3,7,10-11; 1981,1-2,10-11; 1982,1,10-11; 1984,3,7; 1985,4,12; 1986,5,11-12; 1987,1,4,7,9-11; 1988,2,4,9,12; 1989,4-5,9-12; 1990