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

Black wash on tan wove paper

Black ink on buff wove paper

Black ink over charcoal on off-white wove paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Ink on paper

Charcoal on off-white wove paper

Graphite on translucent wove paper

Colored crayons on paper

Black ink, gray wash, and graphite on graph paper

Graphite on paper

Watercolor and graphite on off-white wove paper