Bestand
1968,1-7,9-91; 1969,1-46,48-75; 1970,1-45; 1971,1-35; 1972,1-38; 1973,1-18,20,22-45; 1974,1-40; 1975,1-35; 1976,1-32; 1978,1-21; 1979,1-15; 1980,1-15; 1981,1-15; 1982,1-17; 1983,1-14; 1984,1-18; 1985,1-13; 1986,1-12; 1987,1-11; 1988,1-12; 1989,1,3-8,10-11