Peter Betthausen

About the Authors: Peter Betthausen is Director of the Nationalgalerie, Staatliche Museen, East Berlin. Werner Schmidt is Director of the Kupferstich-Kabinett, Staatliche Kunstsammlungen, Dresden, GDR. Claude Keisch, Gottfried Riemann, and Maria Ursula Riemann-Reyher are on the staff of the Nationalgalerie, East Berlin. Mattias Kuhn and Gertraute Lippold are on the staff of the Kupferstich-Kabinett, Dresden.