Research Project on Economical Apartment Design, 1930: Building type IIIb: first-third floor plans, 1:50

Graphite on paper

Black marker on paper

Graphite on paper; colored crayon on paper

Colored marker on paper

Black crayon or charcoal on paper

Colored crayons on paper

Black crayon on paper

Graphite and colored pencil on paper

Graphite on paper

Graphite on paper

Colored marker and black pen on paper

Black crayon on paper