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

Graphite on paper

Colored marker on paper

Graphite on paper

Ink on on blotter paper

Graphite on paper

Mixed media

Crayon on paper

Graphite with brown and blue crayon on paper

Black crayon on paper

Black ink on paper

Graphite and watercolor on paper

Blue crayon on paper