Research Project on Economical Apartment Design, 1930: IVb, Vb: plans

Colored marker and blue pen on paper

Black crayon on paper

Graphite on paper

Colored marker and black pen on paper

Black crayon on paper

Colored crayon on paper

Black marker and adhesive on paper

Colored marker on paper

Graphite on paper

Black and red marker and black and blue pen on paper

Black marker on paper

Colored crayons on paper