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

Colored marker on paper

Graphite on paper

Colored marker on paper

Graphite on cream wove paper, squared

Black, red and orange crayon on paper

Black crayon on paper

Black marker on paper

Black crayon on paper

Colored marker and black pen on paper

Pastel with charcoal on paper

Colored marker on paper

Graphite and colored pencil on paper