edited by Ortrud Westheider and Michael Philipp ; exhibition, Dietmar Elger, Ortrud Westheider, with Valerie Hortolani ; with contributions by Janice Bretz, [and 7 others]..Gerhard Richter : abstraction /.,.
edited by Ortrud Westheider and Michael Philipp ; exhibition, Dietmar Elger, Ortrud Westheider, with Valerie Hortolani ; with contributions by Janice Bretz, [and 7 others]..,.
