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

Graphite and watercolor on paper

Ink, graphite, and colored pencil on paper

Graphite and colored pencils on paper

Black marker on paper

Graphite on paper

Graphite on paper

Opaque watercolor on paper

Black, brown, and pink crayon on paper

Graphite and colored pencil on paper

Ink on paper

Graphite on paper

Mixed media