Research Project on Economical Apartment Design, 1930: Building type IIIb: basement plan, 1:50

Graphite with yellow and green crayon on paper

Black crayon on paper

Black marker and black pen on paper

Black marker on paper

Charcoal on cream wove paper

Paper

Black ink on paper

Black pen and red marker on paper

Graphite on cream wove paper, squared

Blue pen on paper

Colored marker on paper

Graphite on paper