Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: South elevation, 1:200

Black ink, graphite, and charcoal on off-white wove paper; verso: graphite

Graphite on paper

Sketchbook with cardboard covers and spiral wire binding

Black ink on off-white wove paper

Brown chalk on off-white machine made rag wove paper

Black and brown crayon on cream wove paper

Graphite on gray laid paper

Watercolor over graphite on heavy off-white wove paper

Black ink on illustration board

Graphite on paper

Graphite with black and gray crayon on paper

Graphite on off-white wove paper