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

Graphite on cream wove paper

Black conté crayon on buff laid paper

Charcoal on cream laid paper

Charcoal on blue laid paper

Black ink and charcoal on cream laid paper, edges taped

Graphite on very thin cream laid paper

Watercolor and white gouache over graphite on heavy off-white wove paper

Charcoal and chalk on off-white wove paper

Graphite on paper

Graphite on paper

India ink over graphite on white wove paper

Mixed media on paper