Research Project on Economical Apartment Design, 1930: Ia, Ib, IIb, IIIb: plans

Black marker on paper

Watercolor on paper

Colored marker on paper

Black and metallic marker on paper

Colored marker and black ink on paper

Black crayon on paper

Graphite and colored pencil on paper

Charcoal on off-white wove paper

Graphite on paper

Graphite on paper

Colored marker on paper

Graphite on paper and mounted