Research Project on Economical Apartment Design, 1930: Building type IIb: section, 1:50

Black crayon on paper

Graphite on squared paper

Graphite on paper and mounted

Graphite on paper

Graphite on paper

Black crayon on paper

Graphite and red pencil on paper

Graphite on paper

Black crayon on paper

Graphite on paper

Colored crayons on paper

Watercolor and graphite on off-white wove paper