Franz Marc and August MackeVivian Endicott Barnett, Ronald S. Lauder, Renee Price, Ursula Heiderich, Annegret Hoberg · First published 2018Open the Tome
Rudolf Alexander SchröderRudolf Alexander Schröder, Ursula Heiderich, Günter Heiderich, Focke-Museum · First published 1978Open the Tome
1899-1931, Rudolf Alexander Schröder und die WohnkunstUrsula Heiderich · First published 1977Open the Tome
