Research Project on Economical Apartment Design, 1930: Building type IIb: first, second and third floor plans, 1:50

Black and red marker on paper

Black crayon on paper

Colored marker on paper

Black crayon on paper

Colored crayons on paper

Graphite on paper

Graphite on paper

Blue and brown crayon on paper

Graphite on paper

Graphite on paper

Graphite, partially erased and rubbed, on cream wove paper

Black crayon on paper