Drawings and Watercolors. April 16–May 28, 1969. 144 pps. and cover; 162 works of art. Foreword by Dr. Hans Konrad Roethel.
Drawings and Watercolors. April 16–May 28, 1969. 144 pps. and cover; 162 works of art. Foreword by Dr. Hans Konrad Roethel.