Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Interior elevation

Charcoal and white chalk on brown laid paper

Incised line and Aquarelle on white wove paper

Graphite, ink, and collage elements on paper

Charcoal on cream laid paper

Watercolor over graphite on heavy white wove paper; verso: watercolor over graphite; some color applied and worked with a tool and fingers

Graphite on paper

Black ball-point ink on olive green modern laid paper

Graphite on heavy blue wove paper

Red crayon on thin tan laid paper

Charcoal on off-white laid paper

Graphite on green wove paper, discolored

Graphite, pink and green pencil on white wove paper