Bestand
1951,3; 1959,12; 1969,3; 1970, 6/7-12; 1971,Jan.-März; Juni,Okt.-Nov.; 1972,4; 1973,2-3,6,9,12; 1974,3,6-7,12; 1975,10,12; 1976,3-4,10,12; 1977,1,5-11; 1978,1-7/8,11-12; 1979,1-5,7/8-12; 1980,1-2,6,9/10-11; 1981,24,6,9; 1982,6-8,11/12; 1983,1