German art in the 20th [twentieth] century : painting and sculpture 1905 - 1985 ; [on the occasion of the Exhibition "German Art in the 20th Century, Painting and Sculpture 1905 - 1985", Royal Academy [...] / ed. by Christos M. Joachimides ... With contributions by Werner Becker ... Co-ordinating ed. Walter Grasskamp. München : Prestel, c 1985