Bestand
1976,2-5; 1977,1; 1977,3; 1977,5-6; 1978,1-7; 1979,1; 1979,3-7; 1979,9 - 1980,1 - 1982,2; 1982,4-5; 1982,8; 1983,1-2; 1983,4 - 1984,3; 1984,5 - 1986,3; 1986,5; 1986,7 - 1988,8; 1989,3 - 1990,5; 1991,2-6; 1992,3-4; 1993,1-2; 1994,2; 1995,2; 1996,1-5; 1997,1-6; 1998,1-3; 1998,5-6; 1999,1-6; 2000,1-2; 2000,4; 2001,1-2