beteiligt an den Grafikbörsen:
1//1972, 2//1973, 4//1975, 10//1982, 15//1987, 16//1989, 17//1990, 18//1991, 25//2000, 26//2001, 27//2002, 28//2004, 29//2006, 30//2008, 31//2011, 32//2012, 33//2014, 34//2016