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

Charcoal on paper

Graphite on paper

Black marker on paper

Black marker and blue pen on paper

Colored marker on paper

Watercolor and black ink on paper

Colored marker on paper

Graphite on paper

Graphite on paper

Colored crayons on paper

Black marker on paper

Graphite on paper