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

Watercolor and black chalk on white card

Colored crayons on paper

Colored marker on paper

Gouache and ink over letterpress on paper

Black crayon on paper

Graphite on paper

Colored marker, black pen, and blue pen on paper

Graphite and colored pencil on paper

Graphite with charcoal on off-white wove paper

Colored marker and blue pen on paper

Colored crayons ; graphite on paper

Graphite on paper