Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Balconies: perspective sketch

Graphite and blue crayon on off-white wove paper

Black ink on white wove paper

Black, orange and yellow crayon on paper

Sketchbook with cardboard covers and spiral wire binding

Watercolor on off-white wove paper

Black ink, blue-gray watercolor, brown wash, white gouache, collage, graphite, and touches of red chalk on cream wove paper

Crayon on paper

Watercolor and charcoal on heavy white wove paper

Black ink on thin cream wove paper

Black and red conté crayon on ivory tracing paper

Pen and brown ink over graphite on off-white wove paper

Gray wash on off-white paper mounted on light card