Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: East and north elevations, 1:200

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Graphite on off-white wove paper

Carbon ink from carbon paper, typed, on cream wove paper

Colored crayon on paper

Watercolor

Graphite on commercially lined paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Red, black and brown conté crayon on ivory tracing paper

Black ink on buff wove Japan paper

Graphite, red and blue pencil on off-white wove paper

Graphite on cream wove paper