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

Mixed media

Black crayon on paper

Oil on green wove paper

Mixed media

Black and red marker on paper

Ink on vellum

Watercolor, over graphite, and ink on gray wove paper

Colored marker on paper

Black crayon on paper

Graphite and colored pencils on paper

Colored crayons on paper

Blue crayon on paper