beteiligt an den Grafikbörsen:
8//1979, 10//1982, 11//1983, 12//1984, 13//1985, 14//1986, 15//1987, 16//1989, 17//1990, 18//1991, 25//2000, 27//2002, 28//2004, 31//2011, 32//2012, 33//2014, 34//2016, 35//2018