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

Black and red marker on paper

Graphite and colored pencil on paper

Black marker on paper

Black ink and watercolor on off-white modern laid paper

Black crayon on paper and mounted

Graphite and colored pencil on cream wove paper

Graphite on paper

Graphite on cream wove paper

Black pen and blue marker on paper

Blue pen on paper

Graphite and colored crayon on paper

Graphite on off-white wove paper