Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Sketch of roof plan

Watercolor over graphite on off-white wove paper

Oil(?) paint, pastel, and graphite on paper

Printer's ink and acrylic paint on cream wove paper

Graphite on off-white wove paper, mounted to buff wove paper

Graphite on paper

Charcoal and graphite on off-white laid paper

Black ink with graphite ruling lines on thin ivory laid paper

Charcoal on blue laid paper

Graphite and black crayon with red watercolor on off-white wove paper

Watercolor and black ink on white wove paper

Black ink on off-white wove paper

Graphite on paper