Bestand
7.1915,44,45; 41.1971,10; 42.1972,5-12; 43.1973,1-4,7-11; 45.1974,1-9,11,12; 46.1975,1-12; 47.1976,1,2,4-7,9-12; 48.1977,1-12; 49.1978,1-5,7-12; 50.1979-55.1984; 56.1985,1-9,11; 57.1986,1-12; 58.1987-65.1994; 66.1995,1-5,7-12; 67.1996; 68.1997,2-12